Mathematics for IGCSE & O level - Probability (Section 3 - No. 5)
If the probability of an event is 0.3, what is the probability of its complement (the event not happening)?
0.3
0.6
0.7
1.0
Wyjaśnienie
The probability of the complement is 1 - the probability of the event. 1 - 0.3 = 0.7.