Mathematics for IGCSE & O level - Probability (Section 4 - No. 43)
The probability of a certain event occurring is 0.6. What is the probability of this event *not* occurring?
0.2
0.4
0.6
1.0
Giải thích
The probability of an event *not* occurring is 1 minus the probability of the event occurring. 1-0.6 = 0.4