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Determine the theoretical probability of a simple event · Grade 6 · D2.2

Name: ______________________

Date: ______________________

1
A bag has 4 blue and 3 red marbles. You pick one without looking. What is P(blue)?
Warm-up
Answer:
2
A bag has 4 green and 5 purple marbles. You pick one without looking. What is P(green)?
Warm-up
Answer:
3
A bag has 4 yellow and 1 red marbles. You pick one without looking. What is P(yellow)?
Warm-up
Answer:
4
A spinner has 4 equal sections: 1 red, 2 purple, and 1 blue. What is P(purple)?
On level
Answer:
5
A spinner has 10 equal sections: 3 yellow, 3 blue, and 4 red. What is P(blue)?
On level
Answer:
6
A spinner has 5 equal sections: 1 yellow, 2 green, and 2 red. What is P(green)?
On level
Answer:
7
You roll a fair 6-sided number cube. What is the probability of rolling an even number?
Challenge
Answer:
8
You roll a fair 6-sided number cube. What is the probability of rolling an odd number?
Challenge
Answer:
9
You roll a fair 6-sided number cube. What is the probability of rolling an odd number?
Challenge
Answer:

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Worksheet code: eyJzIjoiZGF0YS1wcm9iYWJpbGl0eS1zaW1wbGUiLCJkIjpbMTY0OTkyNDE5NywxNzA3MjQ2MTg0LDEwNTc2NzA3NjgsMTEzMzAwNzY2NSwxOTA5MzY2ODA5LDIxMzU1MzQyMzMsNjQxNDQwMDEzLDI5Nzg1NDY4NSwxNTA3NDEzOTc5XSwidiI6MX0.f81f9cdb79b9

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Answer key · Determine the theoretical probability of a simple event

1.
4/7 — There are 4 blue out of 7 marbles, so P(blue) = 4/7.
2.
4/9 — There are 4 green out of 9 marbles, so P(green) = 4/9.
3.
4/5 — There are 4 yellow out of 5 marbles, so P(yellow) = 4/5.
4.
2/4 — 2 of the 4 equal sections are purple, so P(purple) = 2/4.
5.
3/10 — 3 of the 10 equal sections are blue, so P(blue) = 3/10.
6.
2/5 — 2 of the 5 equal sections are green, so P(green) = 2/5.
7.
3/6 — 3 of the 6 faces are an even number (2, 4, 6), so the probability is 3/6.
8.
3/6 — 3 of the 6 faces are an odd number (1, 3, 5), so the probability is 3/6.
9.
3/6 — 3 of the 6 faces are an odd number (1, 3, 5), so the probability is 3/6.