Pass maths · Statistics and probability

Basic probability

Learn the method, then complete five focused questions.

Progress…

LZ Method

For equally likely outcomes: probability = favourable outcomes ÷ total outcomes. Probabilities run from 0 to 1. P(not happening) = 1 − P(happening).

  1. 1Bag: 3 red and 5 blue
  2. 2P(red) = 3/8
  3. 3P(not red) = 1 − 3/8 = 5/8