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

$\begin {array} {1 1} (A)\;atleast \: 30 & \quad (B)\;at\: most\: 20 \\ (C)\;exactly \: 25 & \quad (D)\;none\: of\: these \end {array}$

Let $n$ be the number of newspaper which are read.
Then $60 n = 300 \times 5$
$60 n = 1500$
$n = \large\frac{150\not0}{6\not0}$
$= 25$
$n = 25$
Ans : (C)