Page 168 - Math Course 1 (Book 2)

Probability of Simple Events

Real World Example

COLORS
The students in an art class were surveyed about their favorite color. 32% preferred blue, 29% preferred red,
23% preferred yellow, and 16% preferred green. Out of 450 students in the entire school, how many would
you expect to say they prefer red?

A. about 6 B. 29
C. about 131 D. 144

Answer

Skill Practice!

A spinner like the one shown is used in a game. Determine the probability of each outcome if the spinner is
equally likely to land on each section. Express each probability as a fraction and as a percent.

1. P(10) 2. P(odd)

3. P(greater than 7) 4. P(prime) 5. P(1 or 2)

6. P(less than 5) 7. P(Shaded) 8. P(Not shaded)

There are 4 red marbles, 1 blue marble, 9 green marbles, and 6 yellow marble in a bag. Suppose one marble
is selected at random. Find the probability of each outcome. Express each probability as a fraction and as a
percent.

9. P(red) 10. P(blue) 11. P(yellow)

12. P(red or blue) 13. P(white) 14. P(red, blue, or green)

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