Question

If A {5, 7, 8, 9}, B = {3, 4, 5, 6} , then n(A) + n(B) - n(A ∩ B)
a. 5

b. 4

c. 7

d. 6

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Answer 1

Step-by-step explanation:

If A {5, 7, 8, 9}, B = {3, 4, 5, 6} , then n(A) + n(B) - n(A ∩ B)

a. 5

b. 4

c. 7

d. 6

Answer 2

Step-by-step explanation:

n(A) = 4 , n(B) = 4

n(A intersection B) = 1

therefore

4+4-1 = 7