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Nine pieces of paper numbered consecutively from 1 to 9 are put into a hat. If o
Nine pieces of paper numbered consecutively from 1 to 9 are put into a hat. If o
游客
2025-02-24
38
管理
问题
Nine pieces of paper numbered consecutively from 1 to 9 are put into a hat. If one piece of paper is drawn at random from the hat, what is the probability that it will have an even number?
选项
A、1/9
B、2/9
C、4/9
D、1/2
E、5/9
答案
C
解析
把标号为1至9的9片纸放入一个帽子中,若从帽子中随机地抽出1片纸,它是偶数的概率为多少?
解:本题的正确答案是(C)。1至9中偶数有2、4、6和8共四个,那么随机抽出1张纸其标号为偶数的概率为4/9。
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