题目

The price of a stock decreased by 20 percent and then increased by x percent. x < 25.


Quantity A

Final price of the stock after the increase

Quantity B

Initial price of the stock before the decrease

选项

A.

Quantity A is greater.


B.

Quantity B is greater.


C.

The two quantities are equal.


D.

The relationship cannot be determined from the information given.


解析

答案是B。 设初始价格为 a 若涨幅(x)为25%,则 x × 0.8 × 1.25 = x → 价格会回到初始值。但由于 x < 25,说明价格上涨后的最终价格 必然低于下跌前的股票初始价格。
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