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Old 2006-01-24, 16:56   #1
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Jan 2004

40048 Posts
Question Random numbers and proper factors

In my current reading of Maths I have come across the following problem which I am at a loss to ascertain.
Take three positive whole numbers at random.
What is the chance they have no proper factor in common?
Answer around 83%- to be precise, 0.83190737258070746868......:surprised
Can anyone elucidate?
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