Question

The mean of 8 digit is 16. If 3 is subtracted from each digit. Then find new mean.

Answer 1

Answer :-

$\dfrac{x1 + x2 + x3 + x4 - - - - x8}{8}$ = 16

x1 + x2 + x3 + - - - - + x8 = 16 × 8

x1 + x2 + x3 + - - - - + x8 = 128

According to Question :-

New Mean = $\dfrac{x1 - 3 + x2 - 3 + x3 - 3 + - - - + x8 - 3}{8}$

New Mean = $\dfrac{x1 + x2 + x3 + x4 + - - + x8 - (3 \times 8)}{8}$

New Mean = $\dfrac{128 - 24}{8}$

New Mean = 13

So, the New mean is 13.

Answer 2

Answer:

New mean is 13

Step-by-step explanation:

Mean of 8 no. is 16.

Then the sum of no. is 8×16=128.

Sum of digits after subtracting 3 from each digit =128-3x8=104

Hence,mean=104÷8=13