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Key Idea
You can use an experiment to predict outcomes. |
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Vocabulary
• outcomes
• equally likely
• event
• impossible event
• certain event |
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Materials
• number cubes or
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Predicting
Outcomes |
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What outcomes are likely? |
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If you toss a number cube, the possible
outcomes
are 1, 2, 3, 4, 5, and 6. Each outcome
is equally
likely. An event is
a collection of one or more outcomes.
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Compare
the chances of tossing an even number and tossing
an odd number. |
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Event:
Tossing an even number
Favorable
outcomes: 2, 4, 6 |
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3
of 6 possible outcomes are
favorable, so in 3 out of 6 tosses
you can expect an even number. |
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Event:
Tossing an odd number
Favorable
outcomes: 1, 3, 5 |
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3 of 6 possible outcomes are
favorable, so in 3 out of 6 tosses you can expect an odd number. |
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Tossing
an even number and tossing an odd number
are equally likely events. |
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Compare the chances of tossing the number 6 or tossing a number less than
6. |
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| Event:
Tossing the number 6 |
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| Favorable
outcome: 6 |
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1 of the 6 possible outcomes is
favorable, so in 1 out of 6 tosses you can expect the number 6. |
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Event:
Tossing a number less
than
6 |
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| Favorable
outcomes:1, 2, 3, 4, 5 |
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| 5 out of 6 possible outcomes are
favorable, so in 5 out of 6 tosses you can expect 1, 2, 3, 4, or 5. |
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Tossing a 6 is less
likely than tossing a number less than
6.
Tossing a number less than 6 is more
likely than tossing a 6. |
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Talk About It |
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| 1. |
Compare the chances of tossing a 2 or
tossing a 6. Is one event more likely
to occur than the other? Explain. |
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| 2. |
Reasoning
In 10 tosses, how many times would
you expect an even number? |
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