perplexus.info :: Probability : Set of Primes

Set of Primes (Posted on 2009-05-18)

Let X be set of primes from 1 to 100, i.e., X: {2,3,5,7,....,97} and Y be set of numbers whose every prime divisor belongs to set X. A number from Y has exactly 24 positive divisors, find the probability it has exactly 3 distinct prime divisors.

See The Solution Submitted by Praneeth

Rating: 3.0000 (1 votes)

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re: Solution

| Comment 5 of 6 |

(In reply to Solution by Robby Goetschalckx)

re:13800/6900

you mean 13800+6900

Posted by Ady TZIDON on 2009-05-19 07:35:28

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