difference between permutation and combination

Difference between Permutation and Combination explained with examples

A 8 minute read

Permutations and Combinations is a topic full of conundrums. The biggest one is, understanding the difference between permutation and combination. Should I solve this question using permutation or combination? In this article, we will give you a foolproof method to differentiate between the two. In the last article of ‘Permutation and Combination’ series we talked

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How to use Tree Structures to solve GMAT arithmetic problems

A 8 minute read

The objective of this article The primary objective of this article is to explain the use of Visualizing the information given in a question and representing it in the form of a Tree Diagram. This article is helpful for those who have a basic understanding of Percent, Sets, and Elements. After going through the article,

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What was the population of City X in 2002? – OGQR 2020 Question #209 with Solution

A < 1 minute read

[two_third] OGQR 2020: Question No. 209 What was the population of City X in 2002? X’s population in 2002 increased by 2 percent, or 20,000 people, over 2001. In 2001, X’s population was 1,000,000. [/two_third] [one_third_last] Source OGQR 2020 Type Data Sufficiency Topic Word Problems Sub-Topic Percentages Difficulty Medium [/one_third_last] Solution Steps 1 & 2: Understand Question

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A certain painting job requires a mixture of yellow, green, and white paint. If 12 quarts of paint are needed for the job, how many quarts of green paint are needed? – OG 2020 Question #319 with Solution

A 2 minute read

[two_third] OG 2020: Question No. 319 A certain painting job requires a mixture of yellow, green, and white paint. If 12 quarts of paint are needed for the job, how many quarts of green paint are needed? The ratio of the amount of green paint to the amount of yellow and white paint combined needs

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GMAT Permutation and Combination | When to Add and Multiply

A 10 minute read

Are you always confused whether to add or multiply the cases while solving GMAT permutation and combination questions? Do you often get questions incorrect simply because you added entities instead of multiplying them? If the answer to any of the above questions is yes, then read further and learn how to get rid of the confusion

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How to quickly solve GMAT Quant Questions on Time and Work

A 13 minute read

Time and Work problems are the low hanging fruit in the world of GMAT Quant Questions. You can easily learn and apply the concepts. The only question to ask is, ‘Can you solve them faster?’ The answer is Yes. In this article, we’ll compare the conventional methods of solving GMAT Quant questions on Time and

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