5 years ago mean age of a family was 25 years. What is the present mean age of family ???
nitthesh7:
how many members in the family
don't no
then it is not possible to find if there are 2 members will give mean as 30 and 3 members will give mean as 30 and it will be constant when no increase for this question
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Though the number of members are not available, its possible to find the mean.
When the mean was 'x' at 'n' years, the average(mean) after 'k' years will be 'x+k'
Hence mean after 5 years will be 25+5 = 30 years.
When the mean was 'x' at 'n' years, the average(mean) after 'k' years will be 'x+k'
Hence mean after 5 years will be 25+5 = 30 years.
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