mean of 20 observation is 25 if each observation is decreased by 2 find the sum of new observation
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frequency = 20
mean = 25
∑x/20 =25
x= 20×25 = 500
each observation is decreased by 2
so the sum of new observation will be
500 - 20×2
500-100 = 400
mean = 25
∑x/20 =25
x= 20×25 = 500
each observation is decreased by 2
so the sum of new observation will be
500 - 20×2
500-100 = 400
Answered by
0
23 in my opinion it is the answer
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