Probability Math Example 1

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Example 1

easy
A bag contains 55 red, 33 blue, and 22 green marbles. What is the probability of drawing a blue marble?

Solution

  1. 1
    Total number of marbles: 5+3+2=105 + 3 + 2 = 10.
  2. 2
    Number of favorable outcomes (blue): 33.
  3. 3
    Probability: P(blue)=310=0.3P(\text{blue}) = \frac{3}{10} = 0.3.

Answer

P(blue)=310P(\text{blue}) = \frac{3}{10}
Basic probability is the ratio of favorable outcomes to total outcomes. Probability values always fall between 00 (impossible) and 11 (certain).

About Probability

Probability is a number between 0 and 1 (inclusive) that measures how likely an event is to occur, where 0 means impossible and 1 means certain.

Learn more about Probability →

More Probability Examples

Example 2 medium

Two fair dice are rolled. What is the probability that the sum is [formula]?

Example 3 medium

A card is drawn at random from a standard [formula]-card deck. What is the probability it is a heart

Example 4 medium

A box contains [formula] red, [formula] blue, and [formula] green marble. Two marbles are drawn with

Example 5 medium

A bag contains 4 red, 3 blue, and 5 green marbles. What is the probability of drawing a red or blue

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