The mean of the following distribution is Class 0-5 5-10 10-15 15-20 20-25 25-30 Frequency 4 5 7 12 7 5

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Solution

The correct option is B 16
Class intervals Frequency X Fx
0---5 4 3.5 14
5---10 5 7.5 37.5
10--15 7 12.5 87.5
15--20 12 17.5 210.0
20--25 7 22.5 157.5
25--30 5 27.5 137.5
----------------------------------------------------------------------------------
40 644
Then mean= $\frac{644}{40} = 16.1$
Then mean=16

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Similar questions

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

Class	$0 - 5$	$5 - 10$	$10 - 15$	$15 - 20$	$20 - 25$
Frequency	$10$	$15$	$12$	$20$	$9$

Class-interval	$0 - 5$	$5 - 10$	$10 - 15$	$15 - 20$	$20 - 25$	$25 - 30$
Frequency	$5$	$3$	$9$	$10$	$8$	$5$

\begin{matrix} C l a s s & 0 - 5 & 5 - 10 & 10 - 15 & 15 - 20 & 20 - 25 F r e q u e n c y & 10 & 15 & 12 & 20 & 9 \end{matrix}

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