An art student pays a registration fee and a fee per class taken. The number of classes the student takes is unknown. The expression 242c + 125 represents the total paid for the classes and registration.
What do the terms in this expression represent?
Drag and drop the terms into the boxes to correctly answer the question.
The first term:
represents:
The second term
represents
125
242
242c
с
$125 registration fee
$125 for each class taken
$242 for each class taken
$242 registration fee

Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.