At the end of the week, Jason received a paycheck for $534,59. He recorded all of these transactions in his check register.
Trans typ./ Check no. Date Description of Transaction Payment/ Debit (-) Deposit Credit (+) Balance
90000
241
12/4 Miller's Food Market 53.21
53 21
Groceries
846 79
12/7 Frank's Auto Parts 24.05
24 05
Oil and Filter
822 74
243
12/8 Mike's Barber Shop 15.00
15 00
Haircut
807 74
Deposit
12/9 Paycheck
534.59
242
534
59
1,342
32
Evaluate Jason's check register
A Jason did a good job; everything is correct.
B. The final balance is wrong: Jason did not add everything correctly.
C. Jason should have written debit instead of deposit for the transaction type.
D. Jason entered the amount for his paycheck in the wrong column

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.