Problem Solving

试题详情

题目:

A bowl contains one marble labeled 0, one marble labeled 1, one marble labeled 2, and one marble labeled 3. The bowl contains no other objects. If two marbles are drawn randomly without replacement, what is the probability that they will add up to 3? 

选项:

A、1/12
B、1/8
C、1/6
D、1/4
E、1/3

答案:

E

提问:

这道题我一直没有看懂,怎么做才好呀?
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