ONE QUESTION, ONE STEP
ZX-0E8059444C2023年6月A卷 · 第 11 题
2023年6月A卷 · 原库模块 1 · Q11 原库参考解析
A certain book has 250 pages, and 21 of these pages have an illustration. If one of the book's pages is selected at random, what is the probability of selecting a page with an illustration? (Express your answer as a decimal of fraction, not as a percent.)
参考答案：
解题思路
容易忽略的一步
