Mathematics

Problem

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 <br> allowance (in ₹)	$11-13$	$13-15$	$15-17$	$17-19$	$19-21$	$21-23$	$23-25$
Number of children	7	6	9	13	$f$	5	4

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