Question

guys it is urgent please give me answer ​

Answer 1

$n(A\cup B)=n(A) +n(B) -n(A\cap B) \\ \therefore29=15 + n(B)-7 \\\therefore 29=8+n(B) \\\therefore n(B)=21$

Answer 2

Answer:

A∪B)=n(A)+n(B)−n(A∩B)

∴29=15+n(B)−7

∴29=8+n(B)

∴n(B)=21

Step-by-step explanation:

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