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21 April, 19:32

A and B are two events. P (A) = 0.6, P (B) = 0.3 and P (A and B) = 0.1. What is the value of P (A or B) ?

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  1. 21 April, 19:40
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    Answer: The value of P (A or B) is 0.8.

    Step-by-step explanation: We are given P (A) = 0.6, P (B) = 0.3 and P (A and B) = 0.1.

    P (A and B) = 0.1 could be written as P (A∩B) = 0.1.

    We need to find P (A or B) that is P (A∪B) = ?

    We know formula,

    P (A∪B) = P (A) + P (B) - P (A∩B)

    Plugging values in formula, we get

    P (A∪B) = 0.6 + 0.3 - 0.1

    P (A∪B) = 0.9 - 0.1

    P (A∪B) = 0.8.

    Therefore, the value of P (A or B) is 0.8.
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