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The following frequency distribution table shows the amount of aid given to 50 flood affected families. Find the mean of the amount of aid.

Amount of ais
(Thousand rupees)
50-60 60-70 70-80 80-90 90-100
No. of familes 7 13 20 6 4

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The mean of the amount of aid given to families is Rs. 72,400.

[ Note : The above problems are solved using direct method. Student can solve these problems by using other method.]  

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