Question

In a college of 300 students,every student reads 5 newspaper and every newspaper is read by 60 students.What is the number of newspaper ?

Answer 1

Let y - number of different newspapers.
we know that every newspaper is read by 60 students soevery newspaper have a 60 copies and there are total 60*y newspapers in other
hand every of 300 student read 5 different newspapers so total number is 300*5
so we have 60*y=300*5
y=25
so number of different newspapers is 25