Question

The following are the ages (years) of 5 people in a room:

20
,


15
,


25
,


17
,


20


A person enters the room.
The mean age of the 6 people is now 23.
What is the age of the person who entered the room?

Answer 1

41

Explanation:

First, we need to find the sum of the ages of the first five people.

20 + 15 + 25 + 17 + 20 = 97

Then, multiply 23 by 6 to get the sum of the ages of all six people.

23 x 6 = 138

We then subtract 97 from 138 to get the age of the sixth person.

138 - 97 = 41