If the mean of the numbers 27+x, 31+x, 89+ x, 107+x and 156+x is 82, then the mean of 130+x, 126+x, 68+x, 50+x and 1+x is:

8RB Group D 23-Sep-2018 Shift 1 Solved Paper

Question : 95 of 100

Marks: +1, -0

If the mean of the numbers

27+x, 31+x, 89+

x, 107+x

and

156+x

82,

then the mean of

130+x, 126+x, 68+x, 50+x

and

1+x

is:

Solution:

{(27+x)+(31+x)+(89+x) +(107+x)+(156+x)}/5=82

410+5 x=82 \×5

x=0

Thus,

{(130+x)+(126+x)+(168+x)+(50+x) +(1+x)}/5

={375+5 x}/{5}={375}/{5}=75

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