Multiple Choice Questions on If events A and B are independent and p A 0 15 p AB 0 45 Then P B is ........ for NDA Exam Preparation

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Multiple Choice Questions

If events A and B are independent and p A 0 15 p AB 0 45 Then P B is ........

Mathematics (NDA) Probability
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    If events A and B are independent and p(A)=0.15,p(A\cupB)=0.45. Then P(B) is?

    16/17

    Incorrect Answer

    6/17

    Correct Answer

    15/17

    Incorrect Answer

    1

    Incorrect Answer
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    Explanation:

    P(A\capB)=P(A)×P(B)

    =0.15  P(B)

    P(A\cupB)=P(A)+P(B)-P(A\capB)

    0.45=0.15+P(B)-0.15 ×p(B)

    0.30=P(B)(1-0.15)

    0.30=P(B)(0.85)

    P(B)=0.30/0.85

    P(B)=30/85

    =6/17

    By: bhavesh kumar singh
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