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Probability Practice

Last updated almost 5 years ago

14 questions

Note from the author:

Probability using combinations and/or the multiplication rule

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Question 1

1.

Adam has a bag containing 4 yellow gumdrops and 1 gumdrop. What is the probability that Adam eats a yellow gumdrop first and a red gumdrop second? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 2

2.

Alma has a bag containing 4 yellow gumdrops and 1 gumdrop. What is the probability that Alma eats 2 yellow gumdrops? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 3

3.

Zane has a jar containing 4 black marbles and 3 red marbles. What is the probability that Zane grabs 3 black marbles from the jar (without replacement)? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 4

4.

Zahira has a jar containing 4 black marbles and 3 red marbles. What is the probability that Zahira selects a black marble followed by 2 red marbles from the jar (without replacement)? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 5

5.

Baylee has a jar containing 4 black marbles and 3 red marbles. What is the probability that Baylee selects a red marble four times in a row from the jar (without replacement)? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 6

6.

Blake has a jar containing 4 black marbles and 3 red marbles. What is the probability that Blake selects 2 red marbles followed by 2 black marbles from the jar (without replacement)? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 7

7.

Chyna has a jar containing 4 black marbles and 3 red marbles. What is the probability that Chyna selects 2 black marbles from the jar (without replacement)? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 8

8.

Chase has a bag of Hershey's miniatures--there are 32 milk chocolate Hershey bars, 30 dark chocolate Hershey bars, 20 Mr. Goodbye bars, and 18 Krackel bars. What is the probability that Chase pulls out a milk chocolate bar, puts it back in the bag, and then selects a Krackel bar from the bag? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 9

9.

Yessenia has a bag of Hershey's miniatures--there are 32 milk chocolate Hershey bars, 30 dark chocolate Hershey bars, 20 Mr. Goodbye bars, and 18 Krackel bars. What is the probability that Yessenia pulls out 4 Krackel bars at once from the bag? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 10

10.

Yizzi has a bag of Hershey's miniatures--there are 32 milk chocolate Hershey bars, 30 dark chocolate Hershey bars, 20 Mr. Goodbye bars, and 18 Krackel bars. What is the probability that Yizzi pulls out a milk chocolate bar and eats it, then grabs a Mr. Goodbar and eats it, and then grabs a Krackel? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 11

11.

Xenia has a bag of Hershey's miniatures--there are 32 milk chocolate Hershey bars, 30 dark chocolate Hershey bars, 20 Mr. Goodbye bars, and 18 Krackel bars. What is the probability that Xenia pulls 4 milk chocolate bars out in a row (without replacement)? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 12

12.

Xavier has a bag of Hershey's miniatures--there are 32 milk chocolate Hershey bars, 30 dark chocolate Hershey bars, 20 Mr. Goodbye bars, and 18 Krackel bars. What is the probability that Xavier pulls 3 dark chocolate bars out in one grab? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 13

13.

Delcastle's Mathletics team is going on a field trip and there are 18 girls and 16 boys signed up for the trip. What is the probability that the first three students to board the bus are girls and the fourth student to board is a boy? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.

Question 14

14.

Delcastle's Mathletics team is going on a field trip and there are 18 girls and 16 boys signed up for the trip and the teacher needs to ask four of the students to help pass out calculators to the team. What is the probability that all four students selected to help pass out the calculators are boys? Include your calculations with your final answer--you can leave your final answer in fraction or decimal form, whichever you prefer.