Question

Marks of $30$ students in mathematics test are given in the adjacent grouped frequency distribution.

Sl. No	Marks	No of students
$1$	$0-5$	$5$
$2$	$5-10$	$7$
$3$	$10-15$	$10$
$4$	$15-20$	$6$
$5$	$20-25$	$2$

How many students are there in the third group?

Answer 1

$\Rightarrow$ In given table we can see $30$ students are classified in $5$ groups according to their marks.

$\Rightarrow$ Third group contains students who got marks between $10-15$ which $10$

$\therefore$ The third group contains $10$ students.