Question

N(B)=40.A intersection B=20n(A U B) =35 find nA​

Answer 1

Answer:

15

Step-by-step explanation:

N(AUB)=N(A)+N(B)-N(A intersection B)

35=N(A)+40-20

N(A)=35-20=15

Answer 2

Answer:

n(A)=15

Step-by-step explanation:

n(AUB)= n(A)+n(B)-n(A intersection B)

35=n(A) +40-20

n(A)=35-40+20=15.