Conditional Probability and Multiplication Rule
Quiz
•
Mathematics
•
10th Grade - University
•
Practice Problem
•
Hard
Barbara White
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A key ring has 12 keys, 3 of which open the house door. If two keys are randomly selected without replacement, what is the probability that neither key opens the door?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sonia has 5 yellow hair clips, 2 red hair clips, and 3 blue hair clips in her purse. What is the probability that she will randomly select one yellow hair clip and one blue hair clip without replacement?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An experiment consists of spinning a spinner and flipping a fair coin. The spinner consists of 4 colored sections of equal size.
• Red
• Blue
• Green
• Yellow
If the arrow on the spinner is spun one time and the coin flipped one time, what is the probability of getting the outcome “Blue, Tails”?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A store has 20 boxes of cereal A and 10 boxes of cereal B. One box of each kind of cereal has a prize. If one box of each kind is randomly selected, what is the probability that neither box has a prize?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Natasha wants to unlock the supply cabinet in her office. She has 10 cabinet keys and knows that only one of these keys will unlock the supply cabinet. If she randomly selects a key without replacement, which expression represents the probability that the third key selected will unlock the supply cabinet?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A stack of magazines has 5 news magazines and 10 sports magazines. Two magazines are drawn at random without replacement. What is the probability of selecting a news magazine first and then a sports magazine?
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Two spinners are each divided into equal sections, as shown above. Each spinner is spun once. What is the probability that the spinners will land on 2 numbers with a sum of 3.5?
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