Question

Find the value, n(A), if n(B)=33, n(A intersectionB)=12 and n(A union B) =59

Answer 1

Answer:

38

Step-by-step explanation:

nAuB=nA+nB-nA∩B. take nA as x

now substitute

59=x+33-12

59=x+21

x=59-21

x=38