Question

In a class of 40 everyone should take either history or sociology or both.22 have already taken sociology and 26 have taken history.what is the prcentage of students who have taken both

Answer 1

Step-by-step explanation:

let x no.of student take both

only sociology student is 22-x

only history student is 26 -x

then(22-x)+(26-x)+x=40

48-x =40

x=8

so 8 student have taken both

8×100/40 %=20% student have taken both