Mathematics for IGCSE & O level - Probability (Section 5 - No. 23)
A bag contains 2 red marbles, 5 blue marbles, and 3 yellow marbles. What is the probability of selecting a blue marble?
2/10
5/10
3/10
1/3
説明
There are 5 blue marbles out of a total of 10 marbles (2+5+3).