Question

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

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Answer 1

Answer:

new mean =108

Step-by-step explanation:

ANSWER

Given that the mean of 15 numbers is 27

i.e n=15  

mean =27

we know  

Mean =  

No. of numbers(observations)

sum of numbers

​  

 

27=  

15

sum of numbers

​  

 

Sum of numbers =15×27=405

and if each number multiplied by 4.

After multiplication of each number their new sum of numbers will be  

=405×4

=1620

∴ new mean =  

no. of numbers(observations)

new sum of numbers

​  

 

=  

15

1620

​  

 

=108

∴ new mean =108