74.5k views
1 vote
The mean of 28 numbers is 18.

A number is added and the mean becomes 20.
What’s the new number?

User Gofilord
by
7.9k points

1 Answer

7 votes

Answer:

76

Explanation:

If the mean of 28 numbers is 18 then the sum of those numbers=28×18=504

if one number is added then 29×20=580

the new number therefore=580-504=76

User Shinya
by
7.4k points

No related questions found