Question

if n(A-B)=7 and (AnB)=5 then find n(A)​

Answer 1

Answer:

7 is the answer.exmaple

Step-by-step explanation:

A=1.2,3,4,5,6,7

B=1,2,3,4,5,

(A-B)=1,2,3,4,5,6,7-1,2,3,4,5.

=6,7

n(A-B)=7

AnB=5. (common elements inA,B)

n(A) =5+2=7. (2=6,7 when we remove common elements we get remaining 6,7)

Answer 2

Answer:

7 is the ams

hope that this will be help