Practice Complementary Events (7.5) - Probability

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6 questions · about 4 min · pass mark 70%. Hints available.
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4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
If the probability of a student passing an exam is 0.80, what is the probability of not passing?
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Use the formula P(not E) = 1 - P(E).
Question 2.
An event has a probability of 0.25. What is the probability of the complementary event?
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1 minus the given probability.
3Question 3.
What is the probability of an event not occurring if the event has a probability of 0.90?
- 0.10
- 0.90
- 0.50
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Subtract from 1.
4Question 4.
If P(E) = 0.30, what is P(not E)?
- True
- False
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Calculate it to verify.
Question 5.
In an experiment, a die is rolled. The probability of rolling a number greater than 4 is 0.33. What is the probability of rolling a number that is not greater than 4?
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Think about how the probabilities relate.
Question 6.
If the chance of selecting an apple from a basket is 0.60, what is the probability that you do not select an apple? How can this be useful in real-life decisions?
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Apply the complementary concept here.

6 more questions in this section. Enroll free to practise them all.