Question

If n(A)=20, n(B)=25; n(A ∩ B)=15, then find n(A∪ B)=? *

Answer 1

Answer:

n(A)=20

n(B)= 25

n(A n B)=15

Step-by-step explanation:

solution:

n(A u B)= n(A)+n(B) - (A n B)

n(A u B)= 20+25 -15

n(A u B)= 45 - 15

n (A u B)= 30

hope you understand

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