Probability and Statistics Applications MCQ Test 5

1. If the probability of event A is 0.3 and the probability of event B is 0.5, what is the probability of either event A or event B occurring?

2. If the mean of a dataset is 60 and the z-score of a data point is -3, what is the value of the data point?

3. If the probability of event A is 0.6 and the probability of event B is 0.7, what is the probability of either event A or event B occurring?

4. In a deck of cards, what is the probability of drawing a heart?

5. A bag contains 5 red, 4 blue, and 6 green marbles. If two marbles are drawn without replacement, what is the probability of getting two blue marbles?

6. If the variance of a dataset is 25 and there are 5 data points, what is the standard deviation?

7. If the probability of event A is 0.7 and the probability of event B is 0.4, what is the probability of both events A and B not occurring?

8. If the probability of drawing a spade from a deck of cards is 1/4, how many spades are in the deck?

9. A fair six-sided die is rolled. What is the probability of rolling a 5 or a 6?

10. A coin is flipped four times. What is the probability of getting at least three heads?