Multiple Choice Questions on If P A B 0 8 and P A B 0 3 then P A 39 P B 39 equals to ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

If P A B 0 8 and P A B 0 3 then P A 39 P B 39 equals to ........

Quantitative Aptitude (CDS) Probability
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    If P(A?B)=0.8 and P(A?B)=0.3,then P(A')+P(B') equals to?

    1.1

    Incorrect Answer

    0.9

    Correct Answer

    1.2

    Incorrect Answer

    0.1

    Incorrect Answer
    Explanation:

    Here P(A'?B')=1-P(A?B)

     =1-0.8

     =0.2

     P(A'?B')=1-P(A?B)

    =1-0.3

    =0.7                                  

     As we know that-

    P(A'?B')=P(A')+P(B')-P(A'?B')

    0.7=P(A') +P(B')-0.2

    P(A')+P(B')=0.7+0.2=0.9

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