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If each observation is divided by a
then new mean = x¯¯¯a
Now, each item is increased by 10
Required mean = x¯¯¯a +10
Ans : (C)
answer of your question is New mean = (m+xy) /x
We are given the following in the question:
Mean of certain number of observations = m
If each observation is divided by x and then increased by y, then
Thus, the mean is divided by x and then increased by y.
the mean of 'n' observations is x .lf the first item is increased by 1, second by 2 so on, then the new mean is?
sorry i don't know about the answer