Hi, this is my question:

The mean age of 5 friends is 36.

Another person joins the group and the mean age drops to 35.

how old is the 6th person?

im not sure how to work this out so could someone show me please?

Results 1 to 3 of 3

- May 7th 2010, 05:59 AM #1

- Joined
- Oct 2008
- From
- Bristol, England
- Posts
- 897

- May 7th 2010, 06:17 AM #2

- Joined
- Mar 2010
- From
- Bratislava
- Posts
- 115

- May 7th 2010, 06:21 AM #3

- Joined
- Oct 2008
- From
- Bristol, England
- Posts
- 897