# Worksheet: Introduction to Probability

In this worksheet, we will practice using probability terms and axioms to understand the concept of probability.

**Q3: **

What is the probability of a certain event?

**Q4: **

Given that represents the empty set, what is the value of ?

**Q5: **

Let denote the sample space of a random experiment. Find .

**Q6: **

What is the sum of the probabilities of all of the outcomes in a random experiment?

**Q7: **

Which of the following choices may represent the probability of an event occurring?

- A
- B
- C
- D1.3

**Q8: **

What is the probability of a family visiting the beach in a given year?

- A0
- BBetween 0 and 1
- C1

**Q9: **

What is the probability of rolling a number divisible by 7 on a regular dice?

- A0
- B
- C
- D1

**Q10: **

What is the probability of day coming after night?

- A0
- B1
- Cbetween 0 and 1

**Q11: **

What is the probability of rolling an even number on a fair die?

- A
- B
- C
- D

**Q13: **

What is the probability of the pictured spinner stopping on a section which is red?

- A
- B
- C
- D

**Q14: **

What is the probability of the arrow landing on a section numbered by a perfect square when the given fair spinner is spun?

- A1
- B
- C
- D

**Q15: **

What is the probability that the pointer lands on a red section when the given fair spinner is spun?

- A
- B
- C
- D

**Q16: **

What is the probability of the pointer landing on a prime number when the given spinner is spun?

- A
- B
- C
- D

**Q17: **

What is the probability that the pointer stops on a green section when the given fair spinner is spun?

- A
- B
- C
- D

**Q18: **

What is the probability that the pointer lands on a section numbered by a factor of 7 when the given fair spinner is spun?

- A
- B
- C
- D

**Q19: **

What is the probability that the pointer lands on a number greater than 11 when the given fair spinner is spun?

- A
- B
- C
- D

**Q20: **

What is the probability that the arrow stops on a red section when the pictured fair spinner is spun?

- A
- B
- C
- D

**Q21: **

A spinner has 9 equal sections labeled from 1 to 9. Determine the probability of the pointer landing on 3.

- A
- B
- C
- D

**Q23: **

What is the probability of rolling a number divisible by 5 on a fair die?

- A0
- B
- C
- D

**Q24: **

A fair die is rolled two consecutive times. What is the probability of getting a 1 on the first roll?

- A
- B
- C
- D