You may also like

problem icon

Mediant Madness

Kyle and his teacher disagree about his test score - who is right?

problem icon

Marathon Mission

Minnie trained more for the London Marathon this year, so her speed increased. By what percentage did her time decrease?

problem icon

Tyneside Average Speed

Can you work out the average speed of the van?

Growing Families

Age 14 to 16 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.