Question

if n(A)=12,n(B)=20,and ACB,find n(A U B)​

Answer 1

Answer:

20

Step-by-step explanation:

n(A)=12

n(B)=20

A subset B means

AintersectionB=12

n(AUB)=20+12-12=20 answer

Answer 2

Answer:

20

Step-by-step explanation:

A⊂B

It means A is subset of B

So A U B)=B

So n(A U B)=nB=20