Mathematics for IGCSE & O level - Probability (Section 5 - No. 50)
If the probability of a train arriving on time is 0.7. What is the probability it arrives on time for two out of three days?
0.3
0.49
0.63
0.83
คำอธิบาย
There are many combinations to factor in, and the question is not possible to answer with the given details.