If nB 14 nA B 20 and nA B 5 find nASolutionnB 14 nA B 2

If n(B) = 14, n(A B) = 20, and n(A B) = 5, find n(A).

Solution

n(B) = 14

n(A B) = 20

n(A B) = 5

for n(A) = n(A B) +  n(A B) - n(B) formula

putting all the values

we got

n(A) = 5 + 20 -14

n(A)  = 11

Answer