2. 职称英语
  3. How many different five-digit positive integers can be formed using the digits 1

How many different five-digit positive integers can be formed using the digits 1

游客2025-02-23  42
问题 How many different five-digit positive integers can be formed using the digits 1, 2, 3,4, 5,6, and 7 if none of the digits can occur more than once in the integer?
选项
答案 2,520
解析 This example asks how many ways there are to order 5 integers chosen from a set of 7 integers. According to the counting principle above, there are(7)(6)(5)(4)(3)= 2,520 ways to do this. Note that this is equal to
转载请注明原文地址:https://www.tihaiku.com/zcyy/3969945.html
相关试题推荐
随机试题
最新回复(0)