Mathematics for IGCSE & O level - Probability (Section 4 - No. 27)
Given that the probability of Sarah's bus being late on any day is 0.2. What is the probability that Sarah's bus is late on both of two days?
0.4
0.04
0.8
0.16
คำอธิบาย
Probability of late on day 1 is 0.2, probability of late on day 2 is 0.2. Probability of both is 0.2 * 0.2 = 0.04