Study Island Week 5
Probability and Compound Events
Name_______________________________
Score_____________/10
1. In an experiment a six-sided die is rolled a number of times. The results are shown below.
Number Rolled
1
2
3
4
5
6
Number of Times Rolled
8
6
4
4
6
3
Based on these results, what is the experimental probability of rolling either a 1 or 2?
A.
B.
C.
D.
2. Harold has one bag of different-colored, same-size chips and one bag of different-colored, same-size marbles. In
the first bag there are 4 blue chips, 5 red chips, and 3 black chips. In the second bag there are 5 green marbles, 4 blue
marbles, and 3 red marbles. What is the probability that he will pull a blue chip and a blue marble from the bags?
A.
B.
C.
D.
3. Richard conducting an experiment. Every time he flips a fair two-sided coin, he also rolls a six-sided die. What is
the probability that the coin will land on tails and the die will land on an even number?
A.
B.
C.
D.
Keystone Algebra I
4. Sarah has one bag of ten same-size chips numbered 1-10 and one six-sided die. What is the probability that she will
pull an odd number from the bag and roll an odd number on the die?
A.
B.
C.
D.
5. There are two jars. One jar contains 2 red gumballs, 3 green gumballs, and 1 yellow gumball. The other jar contains
2 blue balloons and 3 purple balloons. Jeff randomly draws one gumball and then one balloon. What is the probability
that he will draw a green gumball and a purple balloon?
A.
B.
C.
D.
6. Bob has a coin cup with four $1 tokens and two $5 tokens in it. He also has two $10 tokens and one $25 token in
his pocket. He randomly draws a token from the cup, and then randomly draws a token from his pocket. What is the
probability that he will draw $11 in tokens?
A.
B.
C.
D.
Keystone Algebra I
7. In a group of 294 students, 130 are seniors and 121 are males. Exactly one-half of seniors are females. If a student
is randomly selected, what is the probability that the student is a senior or a female?
A. (
)
B. (
)
C. (
)
D. (
)
E. (
)
8. There is 1 red gumdrop and 4 green gumdrops in a small jar. Also, 3 pieces of butterscotch candy and 2 pieces of
cinnamon candy are in another jar. If Craig draws one piece of candy from each jar without looking, what's the
probability that he will get a green gumdrop and a piece of butterscotch candy?
A.
B.
C.
D.
9. The following balls are placed in an urn: 6 red, 6 yellow, 5 blue, and 3 green. One ball is randomly drawn from the
urn. What is the probability that the ball is either yellow or green?
A.
B.
C.
D.
10. Jeff has 1 red pen and 5 blue pens in his backpack. He also has 4 yellow highlighters and 1 green highlighter in his
backpack. If he reaches into his backpack and grabs one pen and one highlighter without looking, what is the
probability that he will grab a red pen and a yellow highlighter?
A.
B.
C.
D.
Keystone Algebra I
Keystone Algebra I