Question
Mathematics Question on permutations and combinations
In a collage of 300 students, every student reads 5 newspapers and every newspaper is read by 60 students. The number of newspapers is
A
atleast 30
B
atmost 20
C
exactly 25
D
None of these
Answer
exactly 25
Explanation
Solution
Let n be the number of newspapers which are read by the students.
Then, 60n=(300)×5⇒n=25