The probability that a candidate can pass in an exam is 0.6i)What is the probability that he pass in the third trial?ii)What is the probabil

Question

The probability that a candidate can pass in an exam is 0.6i)What is the probability that he pass in the third trial?ii)What is the probability that he pass before the third trial.​

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Cora 7 months 2021-10-07T21:55:40+00:00 1 Answer 0 views 0

Answers ( )

    0
    2021-10-07T21:57:12+00:00

    14

    45


    Explanation:

    P(A or B) = P(A) + P(B) – P(A and B)


    Take


    A = Mr x passes Mathematics


    B = Mr x passes Statistics


    Then we have


    P(A or B) = 4/5 = 2/3 + 4/9 – P(A and B)



    P(A and B) = 2/3 + 4/9 – 4/5


    =

    30

    +

    20


    36

    45


    =

    14

    45

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