Idea 21of 22Builds onAdd, then divide by how manyUse the median when a value is far off
Use the mean for a fair share
How much should each friend pay to make it equal?
Today you'll discover
- when the mean is the right choice
- how a fair share uses the total
Think firstFour friends paid $3, $5, $6, $10 for a pizza
To pay equal amounts instead, how much should each friend pay?
Decide first, then press Next. Watch Dee's extra dollars move.
Four stacks of dollars paid for a pizza: Ana $3, Ben $5, Cy $6, Dee $10. Pieces of Dee's stack slide onto Ana's and Ben's until all four stand level at $6. Then the working: $3 + $5 + $6 + $10 = $24, and $24 ÷ 4 friends = $6 each. The last step shows kilograms of cans collected over four weeks.
See the whole ideathe big idea and the key word, in one place
The big idea
When a total is shared equally, the mean is the fair share.
Three questionsMost popular? The mode. Middle, when one value is far off? The median. Equal share of a total? The mean.
Key word
- fair share
- the amount each gets when a total is split equally; it is the mean
Ready to use it?
- Choose the measure that answers a fair share question.