2. 职称英语
  3. Two hundred multiples of seven are chosen at random, and 300 multiples of eight

Two hundred multiples of seven are chosen at random, and 300 multiples of eight

游客2024-01-14  56
问题 Two hundred multiples of seven are chosen at random, and 300 multiples of eight are chosen at random. Approximately what percentage of the 500 selected numbers are odd?
选项 A、20%
B、25%
C、40%
D、5O%
E、80%
答案 A
解析 All multiples of 8 are even, and half of the multiples of 7 are odd; the multiples of 7 make up 2/5 of the total, so if 1/2 of those multiples of 7 are odd, then 1/5 of the total will be odd, or 20%.
转载请注明原文地址:https://tihaiku.com/zcyy/3360353.html
相关试题推荐
随机试题
最新回复(0)