A pharmacist has filled a box with six different kinds of antibiotic capsules.

There are a total of 300 capsules, which are distributed as follows: tetracycline

(15), penicillin (30), minocycline (45), Bactrim (60), streptomycin (70), and Zithromax (80). She asks her assistant to mix the pills thoroughly and to withdraw a single capsule from the box. What is the probability that the capsule selected is:

a) either penicillin or streptomycin,

b) neither Zithromax nor tetracycline,

c) Bactrim,

d) not penicillin,

e) either minocycline, Bactrim, or tetracycline?