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ZX-222DD1EB8C2024年3月D卷 · 第 18 题
2024年3月D卷 · 原库模块 1 · Q18 原库参考解析
The weights of the four rock samples are 160 grams, 250 grams, 240 grams, and 330 grams, respectively. The weight of the fifth rock sample is x grams. If the average (arithmetic mean) weight of the first four rock samples is the same as the average weight of all five rock samples, what is the value of x ?
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