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If P(A) = 0.8, P(B) = 0.5 and P(B|A) = 0.4, Find P(A ∪ B) - Mathematics

If P(A) = 0.8, P(B) = 0.5 and P(B|A) = 0.4, find  P(A ∪ B)

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Solution

It is given that P(A) = 0.8, P(B) = 0.5, and P(B|A) = 0.4

P(AB) = P(A) + P(B)  P(AB)

P(AB)=0.8 + 0.5  0.32 = 0.98

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NCERT Class 12 Maths
Chapter 13 Probability
Q 3.3 | Page 538
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