In a certain large college course, past records show
that grades of A, B, C, D, and
F (which are the only grades assigned) are equally likely.
If one student is chosen at random, what is:
(a) Pr(C)
(b) Pr(A or B)
(c) Pr(a grade better than D)
(d) Pr(A, B, C, D, or
F)
(e) Pr(B and D)
(f) Pr(E)
If two students who do not know one another take the
course described above, what are the following
probabilities:...