The mean of a data set is equal to 10. If we add 5 to each data value, then the mean become?
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let the number of data be n
so sum of data = mean * number of data
= 10 n
now 5 is added to each data
so now sum becomes = 10n +5n = 15n
mean = sum of data /no. of data
= 15n/n = 15
so new mean becomes 15
so sum of data = mean * number of data
= 10 n
now 5 is added to each data
so now sum becomes = 10n +5n = 15n
mean = sum of data /no. of data
= 15n/n = 15
so new mean becomes 15
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