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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.

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

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