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Two urns (Posted on 2013-01-10) Difficulty: 3 of 5
There are two urns, each with some numbered cards inside.
In urn A there are cards representing all 3-digit numbers (from 109 to 910 inclusively), having 10 as their sum of digits.
In urn B - all 3-digit numbers (from 119 to 920 inclusively), with 11 as their s.o.d.

Assuming you aim to randomly draw a prime number, which urn would you choose?
What if there was a 3rd urn with s.o.d=15, would you consider it as a good choice?

No Solution Yet Submitted by Ady TZIDON    
Rating: 4.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Solutionre(4): computer assisted solution -remarkiCharlie2013-01-11 01:57:35
Hints/Tipsre(3): computer assisted solution -remarkiAdy TZIDON2013-01-11 01:14:02
re(2): computer assisted solutionCharlie2013-01-10 22:32:28
Solutionre: computer assisted solutionsnark2013-01-10 18:51:03
Solutioncomputer assisted solutionCharlie2013-01-10 18:36:33
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