I'm not sure but I think it is A: She will not study drug-2 or drug-1. This is because she wants less of this protein being released by the cells, but using the drug increased the level instead. Please rate low stars if this is incorrect so in the future if this turns out to be incorrect, people won't be mislead to pick the wrong answer
i would say you need to divide 45 and 3. then subtract 45 and 15. then with those two numbers you need to put the amount from 45 / 3 on the top and the 15-45 on the bottom. you will get the probability.
