A drug trial is testing the effectiveness of two drugs. If 50 patients are given Drug A, 20 patients are given Drug B, and 100 patients are given a placebo, what is the probability that a patient will NOT be given a placebo?

Question

espex · Answer

Seems to me that if 70/170 are not given a placebo, then you have a 7/17 chance of not getting a placebo, or 1:2.43 chance of not getting a placebo.

anonymous · Answer

when I divided 70/170, I got the 7/17 answer as well, just wasn't sure of myself. Thank you, I will post my next question in a moment.

anonymous · Answer

Each person in a group of college students was identified by graduating year and asked when he or she preferred taking classes: morning, afternoon, or evening. The results are shown in the table. Find the probability that the student preferred morning classes given he or she is a junior. Round to the nearest thousandth. Survey of Class Times Freshman Sophomore Junior Senior Morning 20 14 16 17 Afternoon 5 10 2 7 Evening 15 15 8 14