Question:

The number of ways of selecting 1515 teams from 1515 men and 1515 women, such that each team consists of a man and a woman, is

Updated On: Jul 28, 2022
  • 19601960
  • 15!15!
  • (15!)2\left(15 !\right)^{2}
  • 14!14!
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The Correct Option is B

Solution and Explanation

First team can be selected in $\left( \, ^{15} C_{1} . ^{15} C_{1}\right)$ way second in (14C1)(14C1)\left(^{14} C_{1}\right)\left(^{14} C_{1}\right) way's and so on So number of ways of selections 1515 teams =(15!)215!=(15!)=\frac{\left(15 !\right)^{2}}{15 !}=\left(15 !\right)
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Concepts Used:

Permutations and Combinations

Permutation:

Permutation is the method or the act of arranging members of a set into an order or a sequence. 

  • In the process of rearranging the numbers, subsets of sets are created to determine all possible arrangement sequences of a single data point. 
  • A permutation is used in many events of daily life. It is used for a list of data where the data order matters.

Combination:

Combination is the method of forming subsets by selecting data from a larger set in a way that the selection order does not matter.

  • Combination refers to the combination of about n things taken k at a time without any repetition.
  • The combination is used for a group of data where the order of data does not matter.