Select the random variable that is not discrete: 0 Numbers are assigned according to the number of days before a share price stops increasing. 0 In a class of 30 students, numbers are assigned to according to the number of students who may pass a test next week. 0 The number -1 is assigned to a share price falling tomorrow, the number 0 is assigned to the share price remaining stable, and the number 1 is assigned to the share price rising. 0 Numbers are assigned according to the length of time it will take to get served at a bank