Aand 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) ?

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.

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