You may also like

problem icon

Bat Wings

Two students collected some data on the wingspan of bats, but each lost a measurement. Can you find the missing information?

problem icon

Kate's Date

When Kate ate a giant date, the average weight of the dates decreased. What was the weight of the date that Kate ate?

problem icon

Balancing the Books

How many visitors does a tourist attraction need next week in order to break even?

Growing Families

Age 11 to 14 Short Challenge Level:

The table shows some information about family sizes.

Number of children 1 2 3 4 5
Number of families 6 13 9 4 1

Find:

a) the mean number of children in a family

b) the mean number of siblings that each child has
 

If you liked this problem, you might also like the longer problem it is based on, The Wrong Stats
You can find more short problems, arranged by curriculum topic, in our short problems collection.