Question

the mean of the data a, b, c, d, e is 10. If 5 is added to each item of the data then the mean of them is _____​

Answer 1

Answer:

Let the observations be a , b, c d, e

Given that, mean of the observations is 10.

Therefore,10= a+b+c+d+e/5 a+b+c+d+e=50___(1)

Given that, 5 is added to each item of the data .

Therefore,

new mean=(a+5) +(b+5) +(c+5) +(d+5) +(e+5) /5

=a+5+b+5+c+5+d+5+e+5/5

=(a+b+c+d+e) +25/5

=50+25/5{from(1) ]

=75/5

=15

therefore, new mean is 15.

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