medium · SAT Math
A survey asked 150 students whether they prefer tea or coffee, and recorded whether each student is an undergraduate or a graduate student. Of the 100 undergraduates, 40 prefer tea and 60 prefer coffee. Of the 50 graduate students, 30 prefer tea and 20 prefer coffee.
If a graduate student is selected at random from those surveyed, what is the probability that the selected student prefers coffee?
- 0.13
- 0.25
- 0.40
- 0.53
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