Question

The mean age of 5 people in a room is 28 years.

A person enters the room.
The mean age is now 29.
What is the age of the person who entered the room?
...

Answer 1

174

Explanation:

You should look at the mean and do this:

5*28 so now you know all the ages which is 140 now you do 140/29 and you get 4.8....... so you can see that the answer is 174