Probability and odds. The probability of an event is often expressed in terms of odds. Specifically, when we say that the odds are k to m that an event will occur, we mean that the probability of the event is k/(k  m). For instance, “the odds are 4 to 1 that candidate Jones will win”

means that P(Jones will win)
Express the following statements in terms of probability.

(a) The odds are 3 to 1 that there will be good weather tomorrow.

(b) The odds are 7 to 3 that the city council will delay the funding of a new sports arena.