Question

$25$ people for applied for programme $A$, $50$ people for programme $B$, $10$ people for both. So number of employee applied only for $A$ is

• A. $15$
• B. $20$
• C. $35$
• D. $40$

Answer 1

The correct option is A $15$

$n(A-B)=n\left(A\right)-n(A\cap B)=25-10-15$