Practice Worked Example (6) - Probability - IB 10 Mathematics

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6 sample questions

Question 1.
What is the probability of rolling a number less than 3 on a die?
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Think of the outcomes less than 3.
Question 2.
If you roll a die, what is the probability of getting a number greater than 2?
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Count all outcomes greater than 2.
3Question 3.
What is the probability of rolling a die and getting an even number?
- 1/6
- 1/2
- 2/3
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Remember to count the even outcomes.
4Question 4.
True or False: The probability of landing a number less than 7 on a die is 1.
- True
- False
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Think about the total outcomes for a standard die.
Question 5.
A box contains 4 red, 5 blue, and 6 yellow balls. If one ball is drawn at random, what is the probability of drawing either a red or yellow ball?
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Combine the favorable outcomes and divide by the total.
Question 6.
If a fair coin is tossed twice, what is the probability of getting at least one head and rolling a number greater than 3 on a die?
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Consider the combinations of the coin and die outcomes.

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