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If 123 students are enrolled in both math and physics class,

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CEO
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If 123 students are enrolled in both math and physics class, [#permalink] New post 12 Nov 2007, 08:28
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If 123 students are enrolled in both math and physics class, how many physics students are not enrolled in the math class (assume all physics students are required to take these two classes)

1. 80 students are taking the math class only
2. 200 students are taking the physics class only


Please explain your answer.
Senior Manager
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 [#permalink] New post 12 Nov 2007, 09:16
(B)??

how many physics students are not enrolled in the math class

these are students enroled in physics class only
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[#permalink] New post 12 Nov 2007, 09:27
From question stem we can assume that B would be SUFF to answer the question
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 [#permalink] New post 13 Nov 2007, 02:40
sidbidus wrote:
(B)??

how many physics students are not enrolled in the math class

these are students enroled in physics class only


yep.pretty straight forward.

OA is B.

we dont know the total students so we cant calculate with the info in (A)
  [#permalink] 13 Nov 2007, 02:40
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If 123 students are enrolled in both math and physics class,

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