As frequently happens to a company making a major acquisition , PeopleSoft 's shares dropped during yesterday 's trading , decreasing $ 1.42 to close at $ 14.97 .
As frequently happens to a company making a major acquisition , PeopleSoft 's shares dropped in Monday 's trading , decreasing 87 cents to $ 15.52 on the Nasdaq Stock Market .
describes the probability that x will take on for each of its possible values (x1, x2, etc).