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Probability Basics - Worksheet 6 - 8th Grade

Medium

Express probabilities as exact fractions, with assumptions about equally likely outcomes stated explicitly.

medium: Practice the same exercise types with a fresh numbered set.

22 problems · 15-20 minutes · Skills: probability, number sense, fractions

About This Worksheet

This medium-level worksheet contains 22 problems designed for 8th Grade students practicing probability basics. Medium worksheets introduce larger numbers and varied question formats to deepen understanding and build fluency.

Read tables and graphs, count outcomes, and calculate with fractions.

  • Express probabilities as exact fractions, with assumptions about equally likely outcomes stated explicitly.
  • Check your result using the method in the example before moving to the next question.

How to Solve: Worked Example

Example Problem: A bag has 4 red and 7 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
Solution Steps:
  1. Count favorable outcomes and all equally likely outcomes.
  2. Divide favorable by total, then simplify.
Answer: 4/11
Tip: Check your result using the method in the example before moving to the next question.
1
A bag has 3 red and 8 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
2
A bag has 9 red and 9 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
3
A bag has 4 red and 1 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
4
A bag has 9 red and 2 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
5
A bag has 6 red and 9 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
6
A bag has 5 red and 8 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
7
A bag has 5 red and 6 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
8
A bag has 4 red and 3 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
9
A bag has 6 red and 4 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
10
A bag has 2 red and 9 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
11
A bag has 7 red and 9 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
12
A bag has 4 red and 7 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
13
A bag has 6 red and 2 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
14
A bag has 8 red and 9 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
15
A bag has 2 red and 1 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
16
A bag has 4 red and 2 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
17
A bag has 7 red and 1 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
18
A bag has 4 red and 4 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
19
A bag has 7 red and 2 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
20
A bag has 1 red and 6 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
21
A bag has 3 red and 3 blue counters. Every counter is equally likely to be drawn. What is the probability of red?
22
A bag has 2 red and 2 blue counters. Every counter is equally likely to be drawn. What is the probability of red?

Answer Key

1. 3/112. 1/23. 4/54. 9/115. 2/56. 5/137. 5/118. 4/79. 3/510. 2/1111. 7/1612. 4/1113. 3/414. 8/1715. 2/316. 2/317. 7/818. 1/219. 7/920. 1/721. 1/222. 1/2

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Frequently Asked Questions

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What skills does this statistics & probability worksheet cover?

This worksheet focuses on probability, number sense, fractions. It is designed for 8th Grade students and provides structured practice through varied problem types with a worked example to guide students before they begin.

Can I use this worksheet in my classroom?

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How many problems are on this worksheet?

This worksheet contains 22 problems. It typically takes 15-20 minutes to complete. An answer key with all solutions is included so parents and teachers can check work quickly.