Basic Probability Statistics Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

easy
A spinner has 8 equal sections numbered 1–8. What is the probability of landing on a number greater than 5?

Solution

  1. 1
    Step 1: Numbers greater than 5: {6, 7, 8} — 3 favourable outcomes.
  2. 2
    Step 2: P(>5)=38P(>5) = \frac{3}{8}.

Answer

38\frac{3}{8}
With equally-sized sections, each number is equally likely. We count how many sections satisfy our condition and divide by the total.

About Basic Probability

Probability is the measure of how likely an event is to occur, expressed as a number between 0 (impossible) and 1 (certain). It is calculated as the ratio of favorable outcomes to total possible outcomes when all outcomes are equally likely.

Learn more about Basic Probability →

More Basic Probability Examples

Example 1 easy

A bag contains 3 red, 5 blue, and 2 green marbles. What is the probability of drawing a blue marble?

Example 2 easy

A fair six-sided die is rolled. What is the probability of rolling an even number?

Example 4 easy

A card numbered 1 through 10 is chosen at random. What is the probability that the number is prime?

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