For Younger for Older

When you click on ‘Continue Reading’ you see tables showing the ages of two groups of children. Find the average (mean) age in each group.

If Abe leaves his group what happens to the average age in the group?

If Chris leaves the group instead what happens to the average?

If Erin leaves the group instead what happens to the average?

What would happen to the average ages in the two groups if Sam left his group and joined the other group?

Can you find a  way for one child to leave one group and join the other so that the average age in the group he leaves drops and the average age in the group he joins rises?

Click here to download the FOR YOUNGER FOR OLDER worksheet

Click here to download the Notes for Teachers – For Younger for Older