Five mark exercise problems I — task. Mathematics State Board, Class 9.

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1. If the mean of the following data is

$20.2$ , then find the value of

$p$ .

Marks	$10$	$15$	$20$	$25$	$30$
No. of students	$6$	$8$	$p$	$10$	$6$

Answer:

$p =$

2. In the class, weight of students is measured for the class records. Calculate mean weight of the class students using Direct method.

Weight in $kg$	$15 - 25$	$25 - 35$	$35 - 45$	$45 - 55$	$55 - 65$	$65 - 75$
No. of students	$4$	$11$	$19$	$14$	$0$	$2$

Answer:

Mean

$=$

$kg$

(Note: Round off the answer to

$1$ decimal place.)

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10. Five mark exercise problems I