HELP!
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?
A. 5/17
B. 10/17
C. 2/17
D. 7/17

Question

HELP!
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?
  A.  	5/17
  B.  10/17
  C.  2/17
  D. 7/17

kropot72 · Answer

The total number of patients in the trial is 170. The number of patients who are not given a placebo is 50 + 20 = 70. Therefore the required probability is 70/170 = 7/17.

ashtarothfick · Answer

Thank you so much I appreciate. you you possibly help me with five others?

kropot72 · Answer

You're welcome :) Please post the others as separate questions. Thanks.