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  4. In a collage of 300 students, every student reads 5 newspapers and every newspaper is read by 60 students. The number of newspapers is

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Q. In a collage of $300$ students, every student reads $5$ newspapers and every newspaper is read by $60$ students. The number of newspapers is

IIT JEEIIT JEE 1998Permutations and Combinations

Solution:

Let $n$ be the number of newspapers which are read by the students.
Then, $60n = (300) \times 5\Rightarrow n = 25$