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Of the 200 students at College T majoring in one or more of [#permalink]
12 Oct 2005, 18:21
0% (00:00) correct
0% (00:00) wrong based on 0 sessions
Of the 200 students at College T majoring in one or more of the sciences, 130 are majoring in chem and 150 are majoring in bio. If at least 30 of the students are not majoring in either chem or bio, then the number of students majoring in both chem and bio could be any number from
A) 20 to 50
B) 40 to 70
C) 50 to 130
D) 110 to 130
E) 110 to 150
Students not taking Bio or Chem = 30
Students taking Chem = 130
Students taking Bio = 150
Total Students taking Bio and Chem = 280
Students taking Bio or Chem = 200-30 = 170
Excess = 280-170 = 110
Not sure where to go from here. If this were test day I would just select D and move on.