
WDYE Flashcard Review 2025
Flashcard
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is theoretical probability?
Back
Theoretical probability is the likelihood of an event occurring based on all possible outcomes, calculated as the number of favorable outcomes divided by the total number of outcomes.
2.
FLASHCARD QUESTION
Front
How do you express probability as a percent?
Back
To express probability as a percent, multiply the probability (as a fraction) by 100 and add the % sign.
3.
FLASHCARD QUESTION
Front
What is a tree diagram?
Back
A tree diagram is a visual representation used to show all possible outcomes of an event, helping to calculate probabilities.
4.
FLASHCARD QUESTION
Front
What is the probability of choosing a green marble if there are 4 green marbles out of 10 total marbles?
Back
The probability is 4/10 or 40%.
5.
FLASHCARD QUESTION
Front
How do you calculate the probability of an event not occurring?
Back
To calculate the probability of an event not occurring, subtract the probability of the event from 1.
6.
FLASHCARD QUESTION
Front
What is the probability of NOT choosing a blue marble if there are 2 blue marbles out of 10 total marbles?
Back
The probability is 8/10 or 4/5.
7.
FLASHCARD QUESTION
Front
If the probability of getting a 5 is 1/2, how many times would you expect to get a 5 in 42 spins?
Back
You would expect to get a 5 approximately 21 times.
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