问题
单项选择题
Raffle tickets numbered consecutively from 101 through 350 are placed in a box. What is the probability that a ticket selected at random will have a number with a hundreds digit of 2 ?()
A.A
B.B
C.C
D.D
E.E
答案
参考答案:A
解析:
从101至350,百位数字是2的数是200至299之间的数,包括200和299,一共有100个;从101至350中共有250个数字,因此 * * 百位数字是2的概率为:
[*]