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by Brent@GMATPrepNow » Mon Nov 04, 2013 8:07 am
mainbhidhruv wrote:My Approach, Please let me know if this is fine....

3 digit Numbers with at least one zero and one non-zero number = 3 digit numbers - { numbers with non zero digits + number with all the digits as zero }

= 10*10*10 - {9*9*9 + 1 } = 1000 - 730 = 270

P = 10/270 = [spoiler]1/27[/spoiler]
Perfect!

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Brent
Brent Hanneson - Creator of GMATPrepNow.com
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