Question

the average of three numbers is 20 if each of these numbers is doubled what is the average

Answer 1

Let the numbers be x, y and z


Given that their average is 20

average is calculated by :-

sum of numbers/total number

=> average = (x + y + z)/3 = 20

=> (x + y + z) = 60


=> Sum of x, y and z is 60

Now these numbers are doubled

=> 2x, 2y and 2z

So sum of 2x + 2y + 2z

= 2(x + y + z) = 2(60)

=> 2x + 2y + 2z = 120

So average = (2x + 2y + 2z) /3

=> 120/3

= 40

Answer :- 40


Conclusion :-

If the numbers are doubled, then the average is also doubled.

Answer 2

hi frnds
I hope u like the answer .
so, the average is 120/3 is 40