Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Of the 200 students at College T majoring in one or more of [#permalink]
26 Aug 2008, 22:46
67% (02:51) correct
33% (01:37) wrong based on 2 sessions
Of the 200 students at College T majoring in one or more of the sciences, 130 are majoring in chemistry and 150 are majoring in biology. If at least 30 of the students are not majoring in either chemistry or biology, then the number of students majoring in both chemistry and biology could be any number from