GCSE Secondary Maths Age 13-17 - Probability & Statistics: Probability - Explained

The video tutorial explains how to calculate probabilities using a table of pen colors. It covers determining the number of black pens by multiplying the total number of pens by the probability of selecting a black pen. It also demonstrates finding the probability of selecting a green pen by subtracting the sum of other probabilities from one. The tutorial emphasizes that probabilities can be expressed as percentages, fractions, or decimals, but not as ratios.

Explain how to calculate the probability of a green pen given the probabilities of other colors.

In what three ways can probabilities be expressed?