2026年6月国际A卷 · 第 20 题

2026年6月国际A卷 · 原库模块 2 · Q20 参考答案

A biologist recorded the head stripe colors for a random sample of sparrows from a certain population. Each sparrow has either a white-striped head or a tan-striped head. The results are shown in the table.

Based on these results, if there are a total of 686 sparrows in this population, which of the following is the best estimate of how many more sparrows in the population have a tan-striped head than have a white-striped head?