Permutation-Combination
Aptitude

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Q.

In how many ways a President, VP and Waterboy can be selected from a group of 10 people.

 A.

${^{10}C_3}$

 B.

${^{10}P_3}$

 C.

240

 D.

360

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Solution:
Option(B) is correct

We are selecting three different posts here, so order matters.

Thus total ways of selecting a President, VP and Waterboy from a group of $10$ people would be ${^{10}P_3}$


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