In a class of 40 students, the number of students who study French is 10 more than the number who study History.How many study History, French, only one subject?

Answer 1

The number of students who study history is 10 more than those who study French means:

H = F + 10

Replace thin in equation:

F + H = 32

F + F + 10 = 32

2 F + 10 = 32

2 F = 32 - 10 = 22

F = 22 / 2

F = 11

H = F + 10

H = 11 + 10 = 21

11 students study French

21 students study History

8 students study both subject