Current location - Training Enrollment Network - Books and materials - A batch of books is distributed to three students, A, B and C. A gets one-fifth of the total and B gets three-quarters of the total.
A batch of books is distributed to three students, A, B and C. A gets one-fifth of the total and B gets three-quarters of the total.
With the method of primary school:

"C gets half of the remaining books, and the remaining books are exactly one eighth of the total books." Then c gets the same as the rest, that is, 1/8 of the total. Take the total as a whole 1. So the number of these books is:

(5+7)/(1-1/8-1/8-1/4-1/5) = 40 copies.