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princessss
- Junior | Next Rank: 30 Posts
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- Joined: Mon Mar 01, 2010 12:09 pm
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If x is positive number less than 10, is z greater than average of x and 10?
(1) z is closer to 10 than x on the number line
(2) z= 5x
It is said that A is the correct answer, but how? If we, for example, take 9 for z and 8 for x we get that z is equal to average of x and 10 and therefore not greater. But if we take any other number it is greater. Doesn't that prove that first statement is not sufficient?
Please help
(1) z is closer to 10 than x on the number line
(2) z= 5x
It is said that A is the correct answer, but how? If we, for example, take 9 for z and 8 for x we get that z is equal to average of x and 10 and therefore not greater. But if we take any other number it is greater. Doesn't that prove that first statement is not sufficient?
Please help
