Question

in a class there are 50 students out of which 40 study maths and 20 study physics.find the number of students who study both maths and physics

Answer 1

you said there are 50 Students and you gave 60 Stu dents

Answer 2

Answer: There are 10 students who study both maths and physics.

Step-by-step explanation:

Since we have given that

Number of total students = 50

Number of students who study maths = 40

Number of students who study physics = 20

We need to find the number of students who study both maths and physics.

So, Using the rule of sets, we get that

$n(M\cup P)=n(M)+n(P)-n(M\cap P)\\\\50=40+20-x\\\\50-60=-x\\\\-10=-x\\\\x=10$

Hence, there are 10 students who study both maths and physics.