Question

. If n(A) = 10, n(A B) = 4, and n(A U B) = 18 then determine n(B).​

Answer 1

Answer:

n(B)= 12

Step-by-step explanation:

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

given,

n(A) = 10

n(A n B)= 4

n(A U B)= 18

substituting the values,

18 = 10 + n(B) - 4

18 - 10 + 4 = n(B)

so,

n(B) = 12

I HOPE THIS WILL HELP U OUT☺️☺️