Math, asked by chopadesaurabh2, 11 months ago

kase slou kare bolo​

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Answered by vishakhasonwaneg
1

Answer:

21

Step-by-step explanation:

n(AuB)= n(A) + n(B) - n(AnB)

29 = 15 + n(B) - 7

n(B) = 29-15+7 = 21

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