Question

the mean of n observations is x. if the first item is increased by 1 and second by 2 and so on find the new mean

Answer 1

✴hy✴
✴here is your answer ✴

since mean of 10 observation is x,

therefore some of an observation is n*x

therefore acc to condition :n*x

new mean is[n*x+n*(n+1)/2]n

so the answer is X+(n+1)/2