Given below is a cumulative frequency distribution showing the marks secured by $50$ students of a class:

Marks	Below $20$	Below $40$	Below $60$	Below $80$	Below $100$
Number of students	$17$	$22$	$29$	$37$	$50$

Form the frequency distribution table for the data.

(N/A) To convert the cumulative frequency distribution into a frequency distribution,we subtract the cumulative frequency of the preceding class from the cumulative frequency of the current class.
$1$. For the interval $0-20$,the frequency is $17$.
$2$. For the interval $20-40$,the frequency is $22 - 17 = 5$.
$3$. For the interval $40-60$,the frequency is $29 - 22 = 7$.
$4$. For the interval $60-80$,the frequency is $37 - 29 = 8$.
$5$. For the interval $80-100$,the frequency is $50 - 37 = 13$.
The resulting frequency distribution table is:

Marks	Number of students
$0-20$	$17$
$20-40$	$5$
$40-60$	$7$
$60-80$	$8$
$80-100$	$13$