solve the following question
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n(AUB) = n(A) + n(B) - n(AnB)
29 = 15 + n(B) - 7
n(B) = 29 - 15 + 7
n(B) = 14 + 7
n(B) = 21
PLEASE MARK AS BRANILIST
29 = 15 + n(B) - 7
n(B) = 29 - 15 + 7
n(B) = 14 + 7
n(B) = 21
PLEASE MARK AS BRANILIST
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