AMC 8 2017 Problem 10

AMC8 2017 年第 10 题

概率★★☆☆☆

A box contains five cards, numbered 1, 2, 3, 4, and 5. Three cards are selected randomly without replacement from the box. What is the probability that 4 is the largest value selected?

一个盒子装了标有 1,2,3,4,5 的 5 张卡片。从中不放回的随机选择 3 张卡片，问 4 是选择的最大的数的概率是多少？

A. $\displaystyle \frac{1}{10}$
B. $\displaystyle \frac{1}{5}$
C. $\displaystyle \frac{3}{10}$
D. $\displaystyle \frac{2}{5}$
E. $\displaystyle \frac{1}{2}$

正确答案 · Correct Answer

C

解析 · Solution

解析整理中

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