Probability

The question

3 red, 6 blue, 3 green — P(green)

3 + 6 + 3=12
3 + 6 + 3=12
green:3
3 + 6 + 3=12
green:3
3 + 6 + 3=12
=
  1. Count everything first: 3 + 6 + 3 = 12 altogether. That is the bottom of the fraction.
  2. Now the ones that count as a win: 3 green.
  3. Chance is the wins over the total. So it is 3 out of 12.
  4. And can be written in bigger pieces: .

How it works.

  1. 01

    Count everything first: 3 + 6 + 3 = 12 altogether. That is the bottom of the fraction.

  2. 02

    Now the ones that count as a win: 3 green.

  3. 03

    Chance is the wins over the total. So it is 3 out of 12.

  4. 04

    And 3/12 can be written in bigger pieces: 1/4.