Answer :

Given : P(A) = 0.4, P(A or B) = 0.6 and P(B) = 0.5


To find : P(A and B)


Formula used : P(A or B) = P(A) + P(B) - P(A and B)


Substituting in the above formula we get,


0.6 = 0.4 + 0.5 – P(A and B)


0.6 = 0.9 - P(A and B)


P(A and B) = 0.9 – 0.6


P(A and B) = 0.3


P(A and B) = 0.3


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