Cumulative frequency. Find the mean age of 100 residents of a colony from the following data:
Age in years No. of Persons
Greater than 0 100
Greater than 10 90
" " 20 75
" " 30 50
" " 40 25
" " 50 15
" " 60 5
" " 70 0
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" " 70 0 hope it helps you
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