Question

How many students got $70$ marks in their entrance exam?

• A. $48$
• B. $29$
• C. $38$
• D. $10$

Answer 1

Answer: (D)

$10$

Frequency distribution table depicting less than cumulative frequency:

$x_i$	$cf$	$f_i$
$100$	$70$	$70-66=6$
$90$	$66$	$66-60=6$
$80$	$60$	$60-48=12$
$70$	$48$	$48-38=10$
$60$	$38$	$38-29=9$
$50$	$29$	$29-21=8$
$40$	$21$	$21-14=7$
$30$	$14$	$14-8=6$
$20$	$8$	$8-3=5$
$10$	$3$	$3$

$\therefore$ for $x_i=70$ we have $f=10$

Hence option $D$ is correct.