Multiple Choice Questions on The number of ways in which a committee of 5 can be chosen from 10 candidates so as to exclude the y........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

The number of ways in which a committee of 5 can be chosen from 10 candidates so as to exclude the y...........

Quantitative Aptitude ( CCS) Permutation & Combination
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    The number of ways in which a committee of 5 can be chosen from 10 candidates so as to exclude the youngest if it includes the oldest is

    196

    Correct Answer

    178

    Incorrect Answer

    202

    Incorrect Answer

    None of these

    Incorrect Answer
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    Explanation:

    if you select the oldest  youngest will exlude then u actually have 8 other options and 4 vacant places so 8 c 4 is the total combinations.
    now second case if u dont select the oldest one one u have 5 places and 9 options so 9c5
    this gives a total ways as 8c4 + 9c5=196

    By: MIRZA SADDAM HUSSAIN
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    Let's Discuss

    Noorbir Singh

    pls explain 8C4 case?

    0 0 reply

    Munesh Kumari

    if you select the oldest then oldest will be selected in 1 way. among remaining 9 youngest will exclude so you actually have 8 other options bcoz and 4 vacant places so 8 c 4 is the total combinations.

     0 0 reply
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