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Number X is chosen at random from the set of positive [#permalink]
 18 Dec 2003, 15:51
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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answer: A
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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Senior Manager
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That's not the right answer
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shubhangi
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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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2/9.
possible values 1,2 for x^2<9
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Senior Manager
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Yup!! Right this time.
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shubhangi
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