Multiple Choice Questions on n a school 35 of the students play chess 45 play carom and 10 play both If a student is selected at ........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

n a school 35 of the students play chess 45 play carom and 10 play both If a student is selected at ...........

Quantitative Aptitude ( CCS) Probability
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    n a school, 35% of the students play chess,45% play carom and 10% play both. If a student is selected at random, then the probability that he plays chess or carom is

    1/10
    Incorrect Answer
    2/5
    Incorrect Answer
    7/10
    Correct Answer

    3/10

    Incorrect Answer
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    Explanation:

    P(A or B)=P(A) + P(B)-P(A and B)
    =35/100+45/100-10/100
    =70/100=7/10

    Hence, option 3 is the correct answer.

    By: Amit Kumar
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