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crackgmat007: Legendary Member; Posts: 882; Joined: Fri Feb 20, 2009 2:57 pmFollowed by: 1 member; Thanked: 15 times; GMAT Score:690

by crackgmat007 » Wed Aug 05, 2009 7:03 pm

OA - D

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Source: Beat The GMAT — Problem Solving | Wed Aug 05, 2009 7:03 pm

prindaroy: Master | Next Rank: 500 Posts; Posts: 113; Joined: Thu Jul 16, 2009 11:23 am; Thanked: 15 times; GMAT Score:730

by prindaroy » Wed Aug 05, 2009 7:46 pm

y = -0.6x + 30

sub all values of x for which y would be an integer so;

x = 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

so 11

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tom4lax: Master | Next Rank: 500 Posts; Posts: 175; Joined: Mon Feb 09, 2009 3:57 pm; Thanked: 4 times

by tom4lax » Thu Aug 06, 2009 6:32 pm

I got 10. Forgot that x=0 was also on the line. Stupid mistake.

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