Probability · JSS 2, SS 2
Probability of an event not happening
Find the chance that something does not happen.
- P(not E) = 1 − P(E)
What the letters mean
- P(E)
- the probability that E happens
Worked example
The probability that it rains tomorrow is 0.3. What is the probability that it does not rain?
Step 1: Subtract from 1
1 − 0.3 = 0.7
Final answer: 0.7
See it
Play with this picture from the Simple Probability lesson.
1st ↓ 2nd →
6 of 36 outcomes → P = 636 = 16