Permutations and Combinations Formula on GMAT

GMAT VIDEOS

• How to Attempt Sentence Correction on GMAT
• A Sentence Must Convey a “Complete” Meaning on GMAT
• A Sentence Must have a Subject and an Active Verb on GMAT
• “Do it” Versus “Do so” on GMAT
• “If” Versus “Whether” on GMAT
• “Like” Versus “As” on GMAT
• “Comparative” Versus “Superlative” Form on GMAT
• “Phrase Comma Subject” and “Subject Comma Phrase” on GMAT
• What are Modifiers on GMAT?
• Misplaced Modifiers on GMAT
• Hanging or Dangling Modifiers on GMAT
• Independent and Dependent Clauses on GMAT
• Types of Phrases on GMAT
• Infinitive vs present participle on GMAT
• Extra Information Between two Commas on GMAT
• Usage of Period and Semicolon on GMAT
• Usage of Pair of Commas on GMAT
• Complex Sentence Structures Involving Many Commas on GMAT
• Usage of Comma on GMAT
• Usage of Colon on GMAT
• Dash and Pair of Dashes on GMAT
• All punctuations on GMAT SC
• 3 Forms of Verb- V1, V2, V3 on GMAT
• Basics of Infinitives, Present Participle, Past Participle on GMAT
• Infinitives on GMAT
• Present Participle on GMAT
• Past Participle on GMAT
• Parallelism Among Verb Forms on GMAT
• Present Participle vs Gerund on GMAT
• Comma plus present participle for cause effect relationship
• Error of “Active Verb Missing” on GMAT
• Cases when Participles Acting as Noun is Correct on GMAT
• “Future in Past”: Two Interesting Constructions on GMAT
• What is Parallelism on GMAT?
• Parallelism in Infinitives and Participles on GMAT
• Parallelism in Conjunctions on GMAT
• Parallelism in Tenses on GMAT
• Logical Parallelism on GMAT
• Exceptions to Parallelism: Case 1 on GMAT
• Exceptions to Parallelism: Case 2 on GMAT
• Exceptions to Parallelism: Case 3 on GMAT
• Appositives on GMAT
• Use of Which, Who, Whose, Where on GMAT
• Can “Whose” be Used for Things or Objects on GMAT
• “Which” Versus “That” on GMAT
• A Rare Case when “That” is Preceded by “Comma” on GMAT
• “And” Versus Other Conjunctions on GMAT
• Comma Splices and Run-ons on GMAT
• Oxford Comma on GMAT
• Subjunctive Mood on GMAT
• Collective, Countables, Uncountable Nouns on GMAT
• Indefinite Pronouns on GMAT
• Many, Any, None, All, Some on GMAT
• “Either-Or” and “Neither-Nor” on GMAT
• An Exception in the Usage of “Each” on GMAT
• Noun-Pronoun Agreement on GMAT
• Pronoun needs a Noun on GMAT
• Avoiding Pronoun Ambiguity on GMAT
• Exceptions to Pronoun Ambiguity on GMAT
• Right “Form” of Pronoun Must be Used on GMAT
• “Who” Versus “Whom” on GMAT
• A Simple Approach for 12 Different Tenses on GMAT
• Simple Tenses on GMAT
• Simple Continuous Tenses on GMAT
• Present Perfect Tense on GMAT
• Present Perfect Continuous Tense on GMAT
• Past Perfect Tense – Use of “Had” on GMAT
• Use of two “Hads” simultaneously on GMAT
• “Future Perfect” and “Future Perfect Continuous” Tenses on GMAT
• Perfect Continuous Tenses on GMAT
• 3 Key Subjunctive Structures on GMAT
• Use of “Considered” and “Regarded As” on GMAT
• “Because” versus “In That” on GMAT
• Use of “So As To” on GMAT
• Use of “Modeled” on GMAT
• Use of “Native” on GMAT
• “Compared with” Versus “Compared to” on GMAT
• “Agree with” versus “Agree to” on GMAT
• Use of “Distinguish” on GMAT
• Use of “Being” on GMAT
• Where Versus When on GMAT
• There Is and There Are on GMAT
• Between Vs Among on GMAT
• Usage of “Forbid” on GMAT
• SC Meaning Error 1: Incorrect Doer on GMAT
• SC Meaning Error 2: Incomplete Meaning on GMAT
• SC Meaning Error 3: Incoherent Meaning on GMAT
• SC Meaning Error 4: Change in Degree or Surety on GMAT
• SC Meaning Error 5: Incorrect Usage of Conjunctions on GMAT
• SC Meaning Error 6: Misplaced Keywords on GMAT
• SC Meaning Error 7: Omission of Words on GMAT
• SC Meaning Error 8: Failing to Convey Cause-Effect Relationship on GMAT
• SC Meaning Error 9: Conveying False Cause-Effect Relationship on GMAT
• SC Meaning Error 10: Conveying Different, Parallel Meaning on GMAT
• Approach for DS Questions on GMAT
• Properties of a “Sufficient” DS Statement on GMAT
• 1 of 5 – Common Mistakes in GMAT Data Sufficiency
• 2 of 5 – Common Mistakes in GMAT Data Sufficiency
• 3 of 5 – Common Mistakes in GMAT Data Sufficiency
• 4 of 5 – Common Mistakes in GMAT Data Sufficiency
• 5 of 5 – Common Mistakes in GMAT Data Sufficiency
• Classification of Numbers on GMAT
• Some Exceptions on Integers on GMAT
• Even and Odd Integers on GMAT
• Even and Odd – 3 Amazing DS Examples on GMAT
• Finding Units Digit of a Huge Multiplication on GMAT
• Finding Last 2 Digits of a Huge Multiplication on GMAT
• How to Find Last Digits of Large Powers and Exponents on GMAT
• Finding the Number of Factors on GMAT
• Finding the Highest Power in a Factorial on GMAT
• Terminating Fractions on GMAT
• How to Find Remainder for a Huge Product on GMAT
• Finding Remainder for a Large Exponent on GMAT
• The Most Favorite Remainder Question Type on GMAT
• An Important Surds and Indices Question Type on GMAT
• Another Important Surds and Indices Question Type on GMAT
• Sets – Two Elements on GMAT
• Sets – Three Elements on GMAT
• A Smart Approach to Percentage Increase and Decrease on GMAT
• Taking Base as 100 in Percentage Questions on GMAT
• Mixtures – Two Elements on GMAT
• Mixtures – Three or More Elements on GMAT
• Alligation – When and How to Use on GMAT
• Application of Alligation on a Question on GMAT
• A Key Concept on Proportion on GMAT
• The Concept of “Variation” or “Proportionality” on GMAT
• Basics of “Profit and Loss” on GMAT
• Basics of “Interest” on GMAT
• Arithmetic Mean or Average on GMAT
• Mode on GMAT
• Median on GMAT
• Standard Deviation on GMAT
• “Range” and “Variation” on GMAT
• Avoid Multiple Variables to Save Time on GMAT
• Solving a Quadratic Equation by Factorization on GMAT
• Inequations – Based on Modulus on GMAT
• Inequations – Based on Factorization on GMAT
• Inequations – Based on Signs on GMAT
• Inequations – Based on -1 to 1 on GMAT
• May be true and Must be true questions on GMAT
• Work – When we can Assume Total Work as 1 on GMAT
• Work – When Total Work is Defined on GMAT
• Work- when negative work is involved on GMAT
• Average Speed on GMAT
• Relative Speed on GMAT
• Angles – Lines on GMAT
• Angles – Triangles on GMAT
• Angles – Circles on GMAT
• Angles – Polygons on GMAT
• Basic Properties of Triangles for GMAT
• Basic Properties of Quadrilaterals for GMAT
• Basic Properties of Isosceles, Equilateral, and Right Triangles on GMAT
• Basic Properties of Circles on GMAT
• Basic Properties of Congruent and Similar Triangles on GMAT
• GMAT’s Favorite Right Triangles
• An Interesting Question Type on Triangles for GMAT
• Another Important Question Type on Triangles for GMAT
• Area of Overlapping Regions I for GMAT
• Area of Overlapping Regions II for GMAT
• Difference Between Prism and Pyramid on GMAT
• How to Find “Curved Surface” Area of any Solid on GMAT
• How to Find “Total Surface” Area of any Solid on GMAT
• How to Find the “Volume” of any Solid on GMAT
• Properties of Sphere and Hemisphere on GMAT
• An Important Concept on Solids on GMAT
• The Coordinate Axis – A Primer for GMAT
• The Distance Between two Coordinates on GMAT
• Equation of a Line on GMAT
• Parallel and Perpendicular Lines on Coordinate Axis on GMAT
• Slope of a Straight Line on GMAT
• Equation of Circle on Coordinate Axis on GMAT
• Length of Perpendicular on Coordinate Axis on GMAT
• A Basic Approach Towards Counting the Arrangements on GMAT
• Difference Between “Permutations” and “Combinations” on GMAT
• Permutations and Combinations Formula on GMAT
• Applying the Permutations and Combinations Formula on GMAT
• Relationship Between Permutations and Combinations on GMAT
• An Explanatory Permutations Example for GMAT
• An Explanatory Combinations Example for GMAT
• Circular Arrangements for GMAT
• Repetitive Arrangements for GMAT
• Distributive Arrangements for GMAT
• 2 Difficult Distributive Arrangement Problems on GMAT
• Teaming on GMAT
• Derangements on GMAT
• What is Probability on GMAT?
• A Logical Probability Example for GMAT
• Another Logical Example on Probability for GMAT
• A Probability Example Based on Set Theory on GMAT
• An Explanatory Example on PnC Based Probability Questions on GMAT
• Basics of Conditional Probability on GMAT
• Areal Probability on GMAT
• Basics of Functions on GMAT
• Commonly Asked Functions on GMAT
• A Commonly Asked Functions Question Type on GMAT
• Another Commonly Asked Functions Question on GMAT
• Arithmetic Progression for GMAT
• Basics of Geometric Progression for GMAT
• Sum of First ‘n’ Positive Integers, Squares, Cubes etc on GMAT
• How to Attempt Reading Comprehensions on GMAT
• How to Attempt Critical Reasoning- The “Missing-Link” Approach on GMAT
• Choices Generally Incorrect on GMAT Critical Reasoning
• Ten Main Question Types on Critical Reasoning on GMAT
• Characteristics of a Correct Assumption on GMAT CR
• Difference Between “Strengthening” and “Assumption” Statement on GMAT CR
• Assumption Negation Test on GMAT Critical Reasoning
• Characteristics of a Strengthening Statement on GMAT Critical Reasoning
• Characteristics of a Weakening Statement on GMAT Critical Reasoning
• Characteristics of an Explanation Statement on GMAT Critical Reasoning
• Beware When you see Numbers in GMAT Critical Reasoning
• Characteristics of an Evaluation Statement on GMAT Critical Reasoning
• Characteristics of an Inference Statement on GMAT Critical Reasoning
• Characteristics of a Conclusion Statement on GMAT Critical Reasoning
• Characteristics of a Para-completion Statement on GMAT Critical Reasoning
• Strategy for Solving Boldface Questions on GMAT Critical Reasoning
• Frequently Used Vocabulary in Boldface Questions on GMAT CR
• Key Points for Boldface Questions on GMAT
• Vocabulary Test 1 for Boldface Questions on GMAT Critical Reasoning
• Vocabulary Test 2 for Boldface Questions on GMAT Critical Reasoning
• Vocabulary Test 3 for Boldface Questions on GMAT Critical Reasoning
• Vocabulary Test 4 for Boldface Questions on GMAT Critical Reasoning
• Vocabulary Test 5 for Boldface Questions on GMAT Critical Reasoning
• A Note on Dialogue Based CR Questions on GMAT Critical Reasoning
• Determining the method of reasoning deployed on GMAT Critical Reasoning
• Similar Reasoning Questions on GMAT Critical Reasoning
• Finding the Flaw in Reasoning on GMAT Critical Reasoning
• Confusing Cause with Effect on GMAT Critical Reasoning
• Confusing Correlation with Causation on GMAT Critical Reasoning
• Assuming that bases are same on GMAT Critical Reasoning
• Incorrect Analogy on GMAT Critical Reasoning
• Generalization on GMAT Critical Reasoning
• Circular Reasoning on GMAT Critical Reasoning
• Impressed by numbers on GMAT Critical Reasoning
• Missing the main point on GMAT Critical Reasoning
• Comparing percentage with absolute numbers on GMAT Critical Reasoning
• Comparing one with oneself on GMAT Critical Reasoning
• Confusing necessity with sufficiency on GMAT Critical Reasoning
• Confusing sufficiency with necessity on GMAT Critical Reasoning
• Confusing possibility with necessity on GMAT Critical Reasoning
• Confusing between subsets and supersets on GMAT Critical Reasoning
• Common Errors in AWA Reasoning on GMAT
• An Effective Structure for AWA Argument on GMAT
• Sample Template for AWA Argument on GMAT
• Time Management for AWA on GMAT
• Typical Week of your Preparation on GMAT
• Importance of One Full Length Test per Week on GMAT Prep
• GMAT Myths you Must Laugh Away
• Correct Mindset for the Test on GMAT
• When the Real GMAT Feels Different from the Prep Done…
• Utilizing the Breaks during the GMAT
• When you are Stuck on a Question on GMAT
• Test Taking Tips on GMAT
• When you run short of time on GMAT…
• How to Guess an Answer Choice Better on GMAT
• Final Tips Before the GMAT