Mathematics for IGCSE & O level - Probability (Section 7 - No. 30)
What's the probability of the train being late on the first two days, given the probability of a train being late is 0.7?
0.14
0.49
0.7
0.3
解释
The probability of the train being late is 0.7, so on two consecutive days will be 0.7*0.7 = 0.49