Math, asked by krishna9984, 1 year ago

If mean of 25 observation is 27 and each is decreased by 7, What will be the new mean?

Answers

Answered by jarpana2003

1

Answer:

Step-by-step explanation:

mean of 25 observations =27

sum of 25 observations =27×25=675

subtracted 7 from each =25×7=175

so,sum of 25 observations-175=675-175

sum of 25 observations-175=500

mean of 25 observations =500÷25=20

ANS:- 20

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