Question

the mean of 27 observations is 35 .if 5 is subtracted from each observation what will be the new mean

Answer 1

total=27×35=945
5 is substrcted from each
then,total =27×5=135
then now total=945-135=810
new mean=810÷27=30

Answer 2

new mean would be 30 if the mean of 27 observations is 35 .if 5 is subtracted from each observation

Step-by-step explanation:

The mean of 27 observations is 35 .

5 is subtracted from each observation

Hence new mean would be 35 - 5 = 30

mean of 27 observations is 35 .

Hence sum of 27 Observations = 27 * 35

= 945

Now 5 is subtracted from each observation

Hence there would be a reduction of 27 * 5

= 135

New Sum would be = 945 - 135

= 810

Observations = 27

New Mean = 810/27

= 30

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