Question

1. The mean of 15 numbers is 27. If each number is multiplied by 4, what
Humbers, what will be
will be the mean of the new numbers?​

Answer 1

Solution :-

The mean of 15 numbers is 27

As we know that,

Mean = Sum of observation / Total observations

Let the sum of observations be x

Subsitute the required values,

27 = x/15

27 * 15 = x

x = 405

Now, we have to multiply each number by 4 then we get :-

= 405 * 4

= 1620

Thus, The new sum of observation is 1620

Therefore,

Again By using mean formula, we get :-

Mean = 1620/15

Mean = 108

Hence, The new mean of the new numbers will be 108 $.$