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Question

Look at the cumulative frequency distribution table given below:

Monthly incomeNumber of familiesMore than Rs.10000100More than Rs.1400085More than Rs.1800069More than Rs.2000050More than Rs.2500037More than Rs.3000015

Number of families having income range 20000 to 25000 is

(a) 19 (b) 16 (c) 13 (d) 22

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Solution

Income
Cumulative frequency
Frequency
Above 30000 15 15
25000-30000 37 37-15=22
25000-20000 50 50-37=13
20000-18000 69 69-50=19
18000-14000 85 85-69=16
14000-10000 100 100-85=15

The number of families having income range 20000 to 25000 is 13.

Hence, the correct answer is option (C)


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