how to solve problem
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n(AUB) = n(A) + n(B) - n(AÛB) Let Û is intersection.
n(AUB) = 39 + 37 - 11 = 65.
65 is the correct answer.
n(AUB) = 39 + 37 - 11 = 65.
65 is the correct answer.
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