Answer :
Answer:
n(A ∪ B) = 35
Step-by-step explanation:
Use the formula for the union of two sets when they are not mutually exclusive
n(A ∪ B) = n(A) + n(B) - n(A ∩ B)
where
n(A) = number of elements in set A
n(B) = number of elements in set B
n(A ∩ B)= number of elements common to sets A and B
∩ is the math symbol for intersection
∪ is the math symbol for union
Given
n(A) = 15, n(B) = 25 and n(A ∩ B) = 5
n(A ∪ B) = 15 + 25 - 5 = 35
