Dencology

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Mar 7, 2008
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guys what does this mean:

two numbers b/w 1 and 30 inclusive are drawn in a contest. what is the probability that both numbers are eve?


they have (15/30)15/30

i thought i should be (15/30)(14/29)

but the answer is (15/30)(15/30)= 1/4

how come? (does this mean that they put the first number back in and then drawn for the second time?)
 

MTD52

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guys what does this mean:

two numbers b/w 1 and 30 inclusive are drawn in a contest. what is the probability that both numbers are eve?


they have (15/30)15/30

i thought i should be (15/30)(14/29)

but the answer is (15/30)(15/30)= 1/4

how come? (does this mean that they put the first number back in and then drawn for the second time?)
I haven't done probabilities in years, but I think the only logical explanation is that yes, they put the first number back. It doesn't say that the numbers are kept out, and that's the only thing that makes sense to me
 

sciencegod

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Nov 20, 2008
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it does no t imply nowhere that the number is removed and not retrnd
 

joonkimdds

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I asked exact same question before and I am surprised that I remember that I asked this question before, LOL. This is from DAT destroyer, am I right?

Many Math questions are too confusing to even start solving.