The mean of a set of data is 5. What will be the mean if ten is subtracted…

let the number of data be n

so, sum of data =mean × number of data

= 5n

now 10 is subtracted to each data

so now sum becomes = 5n-10n = -5n

mean = sum of data /no. of data

= −5​n/n = -5

so new mean becomes -5