Probability - Home
Probability - Home
Probability - Home
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L E S S O N<br />
Describing Probabilities<br />
In a legend, a knight is given two sacks.<br />
Each sack contains all gold nuggets,<br />
all rocks, or a mixture of the two.<br />
The knight can keep one of the sacks.<br />
Ten times for each sack, the knight may<br />
take an object, look at it, and return it.<br />
How can this help the knight choose the<br />
sack with more gold?<br />
In Explore, you will model this situation<br />
using paper bags and counters.<br />
Your teacher will give you 2 paper bags, marked A and B.<br />
Each bag contains 10 counters.<br />
Each bag may contain all yellow counters, all blue counters,<br />
or some counters of each colour.<br />
The yellow counters represent gold nuggets.<br />
The blue counters represent rocks.<br />
➤ Draw a counter from bag A.<br />
Record its colour and replace it.<br />
Do this a total of 10 times.<br />
Based on your results, use a word and a fraction to describe<br />
how likely you are to draw a yellow counter from bag A.<br />
➤ Repeat these steps for bag B.<br />
➤ Based on your experiment, which bag would you choose? Why?<br />
➤ Open the bags.<br />
Did you make the correct choice? Explain.<br />
364 LESSON FOCUS Use words and fractions to describe probabilities.
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