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HMMT 二月 2001 · 冲刺赛 · 第 28 题

HMMT February 2001 — Guts Round — Problem 28

专题
Discrete Math / 离散数学
难度
L3
来源
HMMT

题目详情

  1. [4] How many different combinations of 4 marbles can be made from 5 indistinguish- able red marbles, 4 indistinguishable blue marbles, and 2 indistinguishable black marbles?
解析
  1. [4] How many different combinations of 4 marbles can be made from 5 indistinguish- able red marbles, 4 indistinguishable blue marbles, and 2 indistinguishable black marbles? Solution: 5 + 4 + 3 = 12 .