Find the Probability of Two Events

When two events occur, there are several possible outcomes.

For example, when a coin is thrown, it can land heads up (H) or tails up (T), and when a die is thrown it can land showing a 1, 2, 3, 4, 5 or 6.

So when they are both thrown, the possible outcomes are:

H   1

H   2

H   3

H   4

H   5

H   6

T   1

T   2

T   3

T   4

T   5

T   6

There are 12 possible outcomes.

So the probability of getting a head and a 6, P(H6) = 1/12

Let's have a go at some questions, making sure that we write carefully organised, systematic lists when determining all the outcomes and don't just write out the outcomes randomly.