If the mean of the data given below is 18- find R - Class Interval 11-13 13-15 15-17 17-19 19-21 21-23 23-25 Frequency 3 6 9 13 R 5 4 A- 13 B- 5C- 8D- 6

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Byju's Answer

Standard X

Mathematics

Direct Method of Finding Mean

If the mean o...

Question

If the mean of the data given below is 18, find R ?

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Solution

The correct option is A
8

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Similar questions

Q. The arithmetic mean of the following series is 18, find out the missing frequency.

Class Interval	11−13	13−15	15−17	17−19	19−21	21−23	23−25
Frequency	3	6	9	13	?	5	4

The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is Rs.18. Find the missing frequency f.

Daily pocket allowance (in Rs)	11 − 13	13 − 15	15 −17	17 − 19	19 − 21	21 − 23	23 − 25
Number of workers	7	6	9	13	f	5	4

Q. The mean of the following distribution is

18

. Find the frequency f of the class

19 - 21

Class	$11 - 13$	$13 - 15$	$15 - 17$	$17 - 19$	$19 - 21$	$21 - 23$	$23 - 25$
Frequency	$3$	$6$	$9$	$13$	$f$	$5$	$4$

Question 3
The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is Rs.18. Find the missing frequency f.

$\begin{matrix} Daily pocket allowance (in Rs) & 11 - 13 & 13 - 15 & 15 - 17 & 17 - 19 & 19 - 21 & 21 - 23 & 23 - 25 Number of workers & 7 & 6 & 9 & 13 & f & 5 & 4 \end{matrix}$

Q. The average frequency is

18

. Find the missing frequency

f

Class Interval	Frequency
$11 - 13$	$7$
$13 - 15$	$6$
$15 - 17$	$9$
$17 - 19$	$13$
$19 - 21$	$f$
$21 - 23$	$5$
$23 - 25$	$4$

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If the mean of the data given below is 18, find R ?

The correct option is A 8

The correct option is A
8