Answer :

Let A denote the event that a person will get electrification contract and B denote the event that the person will get a plumbing contract


Given : P(A) = , P(not B) = P() = , P(A or B) =


To find: Probability that he will get both electrification and plumbing contract = P(A and B)


Formula used : P(B) = 1 – P()


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


P(B) = 1 -


P(B) =


Probability of getting at least one contract =


P(A and B)


P(A and B)


P(A and B)


P(A and B)


The probability that he will get both electrification and plumbing contract =


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