9-1 Probability of Simple Events
The spinner shown is spun once. Find the probability of the event. Write the answer as a fraction,
percent, and decimal.
1. P(blue)
ANSWER: , 25%, or 0.25
2. P(red or yellow)
ANSWER: , 37.5%, or 0.375
3. P(not brown)
ANSWER: , 100%, or 1
4. P(not green)
ANSWER: , 62.6%, or 0.625
5. Refer to the table on air travel at selected airports. Suppose a flight that arrived at El Centro is selected at random.
What is the probability that the flight did not arrive on time? Write the answer as a fraction, decimal, and percent.
Explain your reasoning. ANSWER: , 0.2, or 20%; Sample answer: Since 80% arrive on time, that means that 20% do not arrive on time.
6. Model with Mathematics Refer to the graphic novel frame below and on page 709 in the book. Jamar and
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Theresa decide to create a music mix and include an equal number of songs from each genre. What is the probability
that any given song would be from the hip-hop genre?
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ANSWER: , 0.2, or 20%; Sample answer: Since 80% arrive on time, that means that 20% do not arrive on time.
9-1 Probability of Simple Events
6. Model with Mathematics Refer to the graphic novel frame below and on page 709 in the book. Jamar and
Theresa decide to create a music mix and include an equal number of songs from each genre. What is the probability
that any given song would be from the hip-hop genre?
ANSWER: One jelly bean is picked, without looking, from the dish shown. Write a sentence that explains how likely
it is for each event to happen.
7. black
ANSWER: Picking a black jelly bean is impossible since the probability of picking a black jelly bean is 0%.
8. purple, red, or yellow
ANSWER: This is very likely to happen since the probability of picking a purple, red, or yellow jelly bean is 90%,
, or 0.9.
9. Persevere with Problems The probability of landing in a certain section on a spinner can be found by
considering the size of the angle formed by that section. On spinner shown, the angle formed by the yellow section
is one-fourth of the angle formed by the entire circle. So, P(yellow) = , 0.25, or 25%.
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Determine P(green) and P(orange) for the spinner. Write the probabilities as fractions, decimals, and percents.Page 2
b. Determine P(not yellow). 8. purple, red, or yellow
ANSWER: 9-1 Probability of Simple Events
This is very likely to happen since the probability of picking a purple, red, or yellow jelly bean is 90%,
, or 0.9.
9. Persevere with Problems The probability of landing in a certain section on a spinner can be found by
considering the size of the angle formed by that section. On spinner shown, the angle formed by the yellow section
is one-fourth of the angle formed by the entire circle. So, P(yellow) = , 0.25, or 25%.
a. Determine P(green) and P(orange) for the spinner. Write the probabilities as fractions, decimals, and percents.
b. Determine P(not yellow). ANSWER: a.
, 0.125, 12.5%;
b.
, 0.75, 75%
, 0.5, 50%
24. The types of songs on Max's MP3 player are shown on the graph.
Max will play one of the songs at random. Complete the model below to find P(country or R&B).
P(country or R&B) = ANSWER: eSolutions Manual - Powered by Cognero
25. Joel has a bowl containing the number of colored candies shown in the table.
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a.
, 0.125, 12.5%;
, 0.5, 50%
9-1 Probability
of Simple Events
b. , 0.75, 75%
24. The types of songs on Max's MP3 player are shown on the graph.
Max will play one of the songs at random. Complete the model below to find P(country or R&B).
P(country or R&B) = ANSWER: 25. Joel has a bowl containing the number of colored candies shown in the table.
Which of the following probabilities are correct? Select all that apply.
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by Cognero
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9-1 Probability of Simple Events
25. Joel has a bowl containing the number of colored candies shown in the table.
Which of the following probabilities are correct? Select all that apply.
ANSWER: eSolutions Manual - Powered by Cognero
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