The focus of their ire was a girl named Hannah has 6 orange sweets and some yellow sweets. Overall, she has n sweets. The probability of her taking 2 orange sweets is 1/3. Prove that: n²-n-90=0.
这道倍受吐槽的题干是这么写的:汉娜有6颗橙色糖果,和若干黄色糖果。设她共有n颗糖果,而她拿出2颗橙色糖果的几率是3分之1,求证 n²-n-90=0。
Vocabulary
limestone: 石灰岩
calcium carbonate: 碳酸钙
gaffe: 过失
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