Mathematics for IGCSE & O level - Probability (Section 1 - No. 16)
A bag contains 4 red marbles and 6 blue marbles. If you pick one marble at random, what is the probability of picking a blue marble?
2/5
3/5
1/2
1/10
解释
There are 6 blue marbles out of a total of 10. Thus, the probability is 6/10 = 3/5.