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

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Worksheet code: eyJzIjoiZGF0YS1wcm9iYWJpbGl0eS1zaW1wbGUiLCJkIjpbMTMzMjc5NjQ2MCwxMTUxOTg0ODE3LDk1NTcxNTAwNCw1MjQ3ODIyNzcsMTU5NzIyNTk2OCwxOTI5MzUxNzgwLDIxMzM2OTUxNDAsNjM0MzEyMjcxLDE0OTIxMDUzMV0sInYiOjF9.12f59d6648aa

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Answer key · Determine the theoretical probability of a simple event

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