![]() ![]() If you would like to learn more about permutation and combination GMAT questions, including how to solve all of the types of these problems that you will encounter on the exam, try a full-access trial of the Target Test Prep GMAT Course. If you follow these guidelines, you will be one step closer to successfully answering any combination or permutation question that comes your way in the GMAT Quant section. So, these questions will always require permutations. However, the order always matters when arranging items or selecting people for particular positions. ![]() So, these questions will always require combinations. Applying What We’ve Learnedīased on the examples presented, we can identify some helpful patterns that indicate when we should use combinations or permutations.įor example, the order will never matter when creating a team of items or people with no specific positions. ![]() So, we would use a permutation to solve this problem. We see that the following committees would be considered different:īecause a change in the selection order yields two different committees, we see that order matters. Let’s say the 4 residents selected are Sofia, Robert, Julia, and Olivia. In a case such as this, we are dealing with a permutation. The team’s makeup differs depending on which player is in which position. In the above arrangements, even though the same 4 people were selected, we see that the selection order matters because we’re selecting people for specific positions. Let’s review 2 possible arrangements of these specific 4 players. Suppose that Henry, Jasmine, Charlotte, and Jerimiah are again those selected. We need to choose a goalie, a halfback, a forward, and a sweeper. However, this time, we need to place those selected in specific positions. Let’s look again at the same scenario: selecting a 4-person soccer team from 8 people. When the Selection Order Matters, We Use a Permutation When the order of selecting items from a set does not matter, we use a combination to determine the number of possible selections. For instance, if Henry, Jasmine, Charlotte, and Jerimiah are those selected, then we would still have the same team if we chose them in the order Jasmine, Henry, Jerimiah, and Charlotte or if we chose them in the order Charlotte, Jasmine, Jerimiah, and Henry.īecause each of these selections consists of the same members, regardless of the selection order, we would use a combination to determine the number of ways to select the 4-person soccer team. In this situation, does the order of selection matter?īecause we’re assembling a team consisting simply of 4 teammates, the order does not matter in the selection of players. Say that 8 people - Asmah, Charlotte, Emmanuel, Henry, Jasmine, Jerimiah, Ninie, and Panpan - are available to be selected for a 4-person soccer team. When the Selection Order Does Not Matter, We Use a Combination ![]() Let’s explore this distinction in further detail. On the other hand, in a permutation, the order of selection of the items does matter. The short answer to this question is that in a combination, the order of selection of the items does not matter. So, what is the difference between a combination and permutation? Earn a Higher GMAT Score Start Studying With TTP Today! TRY OUR GMAT COURSE FOR $1 What Is the Difference Between a Combination and a Permutation? ![]()
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