7th Grade Theoretical Probability Quizzes, Questions & Answers

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Angles One Variable Equations Perimeter Mutually Exclusive Events Linear Equations Triangle Inequality Composite Areas Percent Decrease Multiplication Complementary Events Vertical Angles Fractions Large Numbers Square Roots Sample Space

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Probability Practice Test Questions! Quiz

Probability is a basic idea for statistics, metrology risk analysis, and game theory, and it comes up quite often in other fields. Probability is the study of the unpredictable sequence of events. The theoretical probability is...

Questions: 10 | Attempts: 815 | Last updated: Mar 21, 2025

Sample Question 1
A bag contains 8 red beads, 14 green beads and x blue beads. If a bead is picked at random from the bag, the probability of picking a green bead is 1/3. Find the value of x.

20

22

23

25

Sample Question 2
A box contains with 27 Mathematics and Science books. If a book is selected at random from the box, the probability of selecting a Science book is 4/9. Then 3 Mathematics books and 2 Science books are added into the box. A book is selected at random from the box. Find the probability of selecting a Mathematics book.

15/32

17/32

5/9

9/16

Sample Question 3
A container contains sweets of orange, coffee and pineapple flavours. A child picks one sweet at random from the container. The probabilities of him choosing a sweet with an orange flavour and a sweet with a coffee flavour are 2/9 and 1/3 respectively. If the number of sweets with pineapple flavour is 160, find the total number of sweets in the container.

450

360

315

270