0<p<1 Quantity A: The greatest value of p(1-p) Quantity B: 1/2

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问题 0<p<1
Quantity A: The greatest value of p(1-p)
Quantity B: 1/2

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.

答案B

解析 p(1-p)=-p2+p=-(p-1/2)2+1/4,或由二次函数对称轴方程x=-b/2a=-1/2可知,当p=1/2时,该式达到最大值为1/4,1/4<1/2,故答案为B。
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本试题收录于: GRE QUANTITATIVE题库GRE分类
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