there are 240 students in class 11 in a school who study mathmatics or physics of these 80 study physics - Maths - Sets

Question

there are 240 students in class 11 in a school who study mathmatics
or physics of these 80 study physics and 20 study both maths and
physics how many study maths?

Shruti Tyagi · Accepted Answer

Dear Student,

Let n(M) be the number of students studying mathn(P) be the number of students studying physicsnP∩M be the number of students studying both physics and mathsnP∪M be the total  number of students
nP∪M =n(M)+n(P)-nP∩M240=n(M) +80-20n(M)=240-80+20n(M)=180Hence number of students studying maths =180

Regards,

there are 240 students in class 11 in a school who study mathmatics or physics of these 80 study physics and 20 study both maths and physics how many study maths?