mean of 20 observation is 25 if each observation is decreased by 2 find the sum of new observation
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Mean=sum of all observation/no of observation
25=sum/20
25×20=sum of all observation
500=sum of all observation
if each observation is decreased by 2 then total sum of observation=
500-2×20=500-40=460
25=sum/20
25×20=sum of all observation
500=sum of all observation
if each observation is decreased by 2 then total sum of observation=
500-2×20=500-40=460
sonali25:
if it helps then mark it as brainliest answer
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