Question

the mean of 12 number is 24 if 5 is added in every number the new mean is

Answer 1

According to question

Mean to 12 numbers = 24

=> (a1 + a2 + a3 +.......... + a12) / 12 = 24

=> a1 + a2 + a3 +........ + a12 = 288

Now,

When 5 is added to each number.....

(a1 +5) + (a2 + 5)............+ (a12 + 5) = 288 + 12×5

=> Sum of new 12 digits = 288 + 60 = 348

New mean = 348 / 12

= 29

Answer 2

Hi,

Please see the attached file !


Thanks