Q7 of 79 Page 24

Find the missing frequency (p) for the following distribution whose mean is 7.68.

x:

3

5

7

9

11

13

f :

6

8

15

p

8

4

Given, mean = 7.68

= 7.68

9P – 7.68P = 314.88 – 303

1.32P = 11.88

P =

P = 9

Find the value of p for the following distribution whose mean is 16.6.

x:	8	12	15	p	20	25	30
f :	12	16	20	24	16	8	4

Find the missing value of p, for the following distribution whose mean is 12.58.

x:	5	8	10	12	p	20	25
f :	2	5	8	22	7	4	2

Find the value of p, if the mean of the following distribution is 20.

x:	15	17	19	20+p	23
f :	2	3	4	5p	6

Find the mean of the following distribution.

x:	10	12	20	25	35
f :	3	10	15	7	5

Questions · 79

24. Measures of Central Tendency

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Find the missing frequency (p) for the following distribution whose mean is 7.68.x:35791113f :6815p84