Question

|A union B| + |A interjection B| = 18, |A|= 13, |B| = ?​

Answer 1

Answer:

P(B) = 5 is the required answer.

Step-by-step explanation:

P( A U B) = P(A) + P(B) - P(A ∩ B)

P(B) = P( A U B) + P(A ∩ B) - P(A)

P(B) = 18-13 = 5

P(B) = 5