Multiple Choice Questions on In a college 10 of the students speaking English 70 speaking Hindi and 10 speaking both If a st........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

In a college 10 of the students speaking English 70 speaking Hindi and 10 speaking both If a st...........

Quantitative Aptitude ( CCS) Probability
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    In a college 10% of the students speaking English, 70%  speaking Hindi and 10% speaking both.If a students is selected at random, what is the probability of the students who speak English or Hindi ?

    9/5

    Incorrect Answer

    10/7

    Incorrect Answer

    7/10

    Correct Answer

    5/7

    Incorrect Answer
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    Explanation:

    Answer
    7/10
    Explanation :
    P(a) = 10/100 = 1/10
    P(b) = 70/100 = 7/10
    P(both) = 10/100 = 1/10
    P(a U b) = (1+7-1)/10 = 7/10

    By: Sandeep Dubey
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