Complete the given table and check the solution which satisfies the equation $\frac{n}{2} = 10$
$n$ $5$ $10$ $15$ $20$ $25$ $30$
$\frac{n}{2}$

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Solution

For the equation $\frac{n}{2} = 10$ let us put various values of $n$
$n$ $5$ $10$ $15$ $20$ $25$ $30$
$\frac{n}{2}$ $2.5$ $5$ $7.5$ $10$ $12.5$ $15$
At $n = 20$ $,$
$L . H . S = R . H . S$
Hence $,$ the solution of the equation $\frac{n}{2} = 10$ is $n = 20$

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Marks:	0-5	5-10	10-15	15-20	20-25	25-30	30-35
No. of students	2	6	13	17	11	4	2

Interval	$10 - 15$	$15 - 20$	$20 - 25$	$25 - 30$	$30 - 35$
$x$	$2$	$1$	$4$	$6$	$5$

Class:	$5 - 10$	$10 - 15$	$15 - 20$	$20 - 25$	$25 - 30$	$30 - 35$	$35 - 40$	$40 - 45$
Frequency:	$5$	$6$	$15$	$10$	$5$	$4$	$2$	$2$

Profit	$5 - 10$	$10 - 15$	$15 - 20$	$20 - 25$	$25 - 30$
No. of companies	$4$	$28$	$49$	$17$	$2$

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$n$	$5$	$10$	$15$	$20$	$25$	$30$
$\frac{n}{2}$	$2.5$	$5$	$7.5$	$10$	$12.5$	$15$