Identify complementary events and use the sum of probabilities to solve problems (ACMSP204)
LO: To identify complementary events and use the sum of probabilities to solve problems.
Know:
- That all the probability of a chance experiment ranges from 0 to 1.
- How to add decimal numbers.
- how to calculate elapsed time
- Events can be complementary or not complementary.
Understand:
- That all complementary events equal to 1.
Do:
- I can identify complementary events and use the sum of probabilities to solve problems..
Complementary Events
Complementary events are “opposite events“. For example, the chances of rolling a 5 and the chances of not rolling a 5 are complementary events.The probability of complementary events always add up to 1 (for 100%), because there are no other options.For example, you can be blue or not blue (blue’), you can be an even number or not an even number, but nothing else! |