Step 10 Objective
Find the probability of two independent events occurring.
- Examples of what pupils should
know and be able to do - Probing questions
- What if pupils find
this a barrier?
Examples of what pupils should know and be able to do
Pupils need to know that the probabilities of two, or more, independent events can be multiplied together to obtain the probability of both, or all, occurring.
- Pots - Rtf (rich text format) document (12Kb)
- Traffic Lights - Rtf (rich text format) document (12Kb)
Using both of the above, pupils should be able to construct a probability tree diagram.
Using a tree diagram depicting rain and not rain on two days in the week, the probability of it raining on just one of the two days can be found by adding together the probabilities for [rain and not rain] and [not rain and rain].