# Lesson Worksheet: Introduction to Probability Mathematics • 7th Grade

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

Q1:

Which of the following may be the probability of an event occurring?

• A
• B
• C1.6
• D

Q2:

What is the probability of a student riding a bike to school?

• A0
• B1
• CBetween 0 and 1

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

Q12:

Each section on this spinner is equally likely to be chosen. What is the probability of the arrow landing on the number 4? Give your answer as a fraction in the simplest form. • A
• B
• C
• D0
• E

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
• E

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

Q22:

Which of the following may be the probability of an event occurring?

• A
• B
• C1.8
• 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

Q25:

A box contains colored balls: red, green, blue, and yellow. If the box contains 12 green balls, where the probability of drawing one of them randomly is , what is the total number of the balls in the box?