Question

In a class, 16students read mathematics,17 read general science and 6 read both, then the number of students in the class which read either mathematics or general studies is

• A. 6
• B. 10
• C. 17
• D. 27

Answer 1

The correct option is D

27

$n\left(A\right)=16,n\left(B\right)=17,n(A\cap B)=6$
$\therefore (A\cup B)=n\left(A\right)+n\left(B\right)-n(A\cap B)=27$