Question

If the mean of a 30 is 71 then if we add 5 to each number what will be the mean?

Answer 1

Mean= sum of observation
———————————
Total numbers of observations
71= sum of observation
———————————
30
71*30 = sum of observation
2130 = sum of observation

5 add to each observation so
30*5 + 2130
—————— = 2280
30 —————— = 76
30