A) 12
B) 8
C) 16
D) None of these
Correct Answer: A
Solution :
Let \[n\,(P)\]= Number of teachers in Physics. \[n\,(M)\]= Number of teachers in Maths \[n\,(P\cup M)=n(P)+n\,(M)-n\,(P\cap M)\] \[20=n\,(P)+12-4\] Þ \[n\,(P)=12\].You need to login to perform this action.
You will be redirected in
3 sec