Question

if no of elements in A is 43 and no of elements in B is 51 and no of elements in A union B is 75 ,then no of elements in A-B union B-A

Answer 1

Answer:

56

Step-by-step explanation:

n(A) + n(B) - n(A∩B) = n(A∪B)

43 + 51 - n(A∩B) = 75

94 - n(A∩B) = 75

n(A∩B) = 94 - 75

n(A∩B) = 19

A - B = n(A) - n(A∩B) = 43 - 19 = 24

B - A = n(B) - n(A∩B) = 51 - 19 = 32

(A - B) ∪ (B - A)

= 24 ∪ 32

= 56

hope you get your answer