Study Guide and Intervention (continued) - MathnMind

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Odds The odds of an event occurring is the ratio of the number of ways an event can occur
(successes) to the number of ways the event cannot occur (failures).
Odds
Example
A die is rolled. Find the odds of rolling a number
greater than 4.
The sample space is {1, 2, 3, 4, 5, 6}. Therefore, there are six possible outcomes. Since 5 and
6 are the only numbers greater than 4, two outcomes are successes and four are failures.
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So the odds of rolling a number greater than 4 is , or 1:2.
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Exercises
NAME ______________________________________________ DATE ____________ PERIOD _____
Study Guide and Intervention (continued)
Probability: Simple Probability and Odds
number of successes
number of failures
Find the odds of each outcome if the spinner at the right is
spun once.
1. multiple of 4 2. odd number
3. even or a 5 4. less than 4
5. even number greater than 5
Find the odds of each outcome if a computer randomly chooses a number between
1 and 20.
6. the number is less than 10 7. the number is a multiple of 4
8. the number is even 9. the number is a one-digit number
A bowl of money at a carnival contains 50 quarters, 75 dimes, 100 nickels, and
125 pennies. One coin is randomly selected.
10. Find the odds that a dime will not be chosen.
11. What are the odds of choosing a quarter if all the dimes are removed?
12. What are the odds of choosing a penny?
Suppose you drop a chip onto the grid at the right. Find the odds
of each outcome.
13. land on a shaded square
14. land on a square on the diagonal
15. land on square number 16
16. land on a number greater than 12
17. land on a multiple of 5
© Glencoe/McGraw-Hill 106 Glencoe Algebra 1
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