Question

The mean of 10 numbers is 8. If 2 is added to every number, what will be the new mean?

Answer 1

SOLUTION

GIVEN

• The mean of 10 numbers is 8.

• 2 is added to every number

TO DETERMINE

The new mean

EVALUATION

Here it is given that The mean of 10 numbers is 8.

∴ Sum of 10 numbers

= ( 10 × 8 )

= 80

Now 2 is added to every number

So the every number will increased by 2

So the sum will increased by 10 × 2 = 20

∴ New sum = 80 + 20 = 100

∴ The required new mean

$\displaystyle \sf{ = \frac{100}{10} }$

$= 10$

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