Probability STAAR Review O and B

Name _______________________________
Probability STAAR Review
1. A desk drawer contains the different-colored markers listed below.
• 3 green markers
• 5 blue markers
• 10 red markers
A marker will be randomly selected from the drawer and then replaced. Then another marker will be randomly
selected from the drawer. What is the probability that a green marker will be selected both times? Give the
probability as a fraction.
2. A bag of fruit contains 3 apples, 2 oranges, 1 banana, and 4 pears. Jerry will randomly select one piece of fruit,
pack it in his lunch, and then select one piece of fruit to eat for breakfast. What is the probability that the first
piece of fruit Jerry selects will be a banana and the second piece of fruit will be a pear? Give the probability as a
fraction.
3. Ricky is selecting a jersey. His choices are shown below.
Ricky chooses a jersey at random and then replaces it. He then selects a second jersey at random. What is the
probability that Ricky selects a striped and then a white jersey? Give the probability as a percent.
4. A dart is thrown at the target shown below. If the dart hits the target randomly, what is the probability that it will
land in the unshaded section of the target? Give the probability as a fraction.
5. There were 6 purple socks and 4 orange socks in a drawer. Without looking, what is the probably that Xavier will
select a pair of orange socks to wear? Give the probability as a fraction.
6. Felix is reading the sign below in order to decide when to go to a violin lesson.
The list below shows some of the possible outcomes of 1 day and 1 time to have a violin lesson.
Which list shows all the other possible outcomes of 1 day and 1 time to have a lesson?
7. Oscar decided to take two classes during summer school. His options for his first and second period classes are
shown below.
1st Period 2nd Period
Math
Art
English
Music
Science
Theater
History
How many different schedules of two classes are possible?
8. Vicky has a set of cards, as shown below.
Without looking, Vicky will select one card. What is the probability of the complement of selecting a heart? Give
the probability as a fraction.
9. A shoe store allows customers to spin a wheel in order to earn a coupon for their purchase. The wheel has 12
sections, as shown below.
Out of the next 70 customers who spin the wheel, how many customers could be expected to spin a $1 coupon?
10. A popular chocolate chip cookie comes in two varieties, regular and reduced fat. Each package contains 15
cookies. Marie counted the number of chocolate chips per cookie in a package of regular cookies and in a
package of reduced fat cookies. The dot plots show her results.
If Marie randomly selected a cookie from each variety, what is the probability that both cookies will have exactly
16 chocolate chips? Give the probability as a fraction.
11. Robert’s track coach used a stopwatch to find out how long it took Robert to run one lap on the track. The times
of five of Robert’s laps are listed in the table.
Time
Lap
(seconds)
1
55.2
2
59.3
3
60.4
4
58.9
5
62.5
Based on these results, what is the experimental probability that Robert will run his next lap in less than 60
seconds? Give the probability as a fraction.