HMMT 二月 2006 · GEN1 赛 · 第 2 题
HMMT February 2006 — GEN1 Round — Problem 2
题目详情
英文原题
- What is the probability that two cards randomly selected (without replacement) froma standard 52-card deck are neither of the same value nor the same suit?
解析
英文解析
- What is the probability that two cards randomly selected (without replacement) froma standard 52-card deck are neither of the same value nor the same suit?
Answer:12
Solution: After choosing a first card, the second needs to be in one of the other 17
3 · 12 12
three suits and of a different value. Hence, the answer is = .
52 − 1 17