Mathematics for IGCSE & O level - Probability (Section 2 - No. 11)
If the chance of rain tomorrow is 40%, what is the probability that it *will not* rain tomorrow?
0.4
0.6
0.5
1.0
คำอธิบาย
The probability of an event not occurring is 1 - probability of the event occurring. 1 - 0.4 = 0.6