The probability of getting at least one head on two flips of a coin is .75. The chances of rain tomorrow are 75 per- cent. I think the odds of George’s marrying Martha are 3 to 1. Does “probability = .75’’ mean the same thing in each of the above cases? The preceding discussion concerning unlikely coincidences might be summarized aphoristically as, “It’s very improbable that no improbable event will occur.’’ Are both uses of “improbable’’ in this statement the same?