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# Number X is chosen at random from the set of positive

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Senior Manager
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Number X is chosen at random from the set of positive [#permalink]

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18 Dec 2003, 15:51
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Number X is chosen at random from the set of positive integers less than 10 .what is the probability that (9/x)>x ?
A.1/5
B.2/3
C.7/9
D.1/3
E.2/9
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shubhangi

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18 Dec 2003, 16:09

Set of numbers is: 2,4,6,8,10 --> 5 possible numbers
9/x > x ---> 9 > x^2
Only 2 satisfies this inequality
Thus, 1 chance out of 5
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18 Dec 2003, 16:29
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shubhangi

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18 Dec 2003, 16:56
oops, I misread the question. E is the answer and I'm sure 100% this time

Set is 1 to 9.
and you can get either 1 or 2 that satisfies the equation 9>x^2
so 2/9
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18 Dec 2003, 22:21
2/9.
possible values 1,2 for x^2<9
Senior Manager
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19 Dec 2003, 10:29
Yup!! Right this time.
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shubhangi

19 Dec 2003, 10:29
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