question_answer

If\[n(A)=8\]and\[n(A\cap B)=2,\] then\[n((A\cap B)\cap A)\]is equal to

A)  2                                            

B)  4

C)  6                            

D)         8

E)  10

Correct Answer: C

Solution :

Given, \[n(A)=8,n(A\cap B)=2\] \[n(A\cap B)\cap A)=n(A)-n(A\cap B)\]                 \[=8-2=6\]