GMAT Problem Solving (PS) | Re: A pack of baseball cards consists of 12 outfielder cards and 8 infield

Will try substituting.

Try choice B) 5
(12-5)/(8+12-5)=7/15 ~7/14 -> so just over 50% NOT GODD

Try choice C) 7
(12-7)/(8+12-7)=5/13=0.38 something or 38% NO MORE than 40 > C is the answer!

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