Question

In a library there are 990 books if the number of books English is 4 times the number of mathematics books and the number of mathematics books is twice the number of science book find the number of books of each subject

Answer 1

Answer:

Number of books in Science = 90

Number of books in Mathematics = 180

Number of books in English = 720

E = 4M

M = 2S

SO, E = 4*2S = 8S

Total = S + 2S + 8S = 11S = 990

S = 990/11 = 90

M = 2*90 = 180

E = 4*180 = 720