instruction:
You are given a mathematical question described with an open-ended vocabulary. Questions in this task involve real-world situations, describing a mathematical problem. You are also given 4 or 5 answer options (associated with "A", "B", "C", "D", "E"). Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. LaTeX mathematical format (the standard way to express mathematical expressions in the typesetting software known as LaTeX) is used to express equations. Each question is solvable with high school math knowledge. Give only one answer for each question.
question:
On a certain test, a class of 12 students has an average (arithmetic mean) score of 80. A second class of 18 students has an average score of 85. What is the average score of the combined classes?
(A)82 (B)82.5 (C)83 (D)84 (E)84.5
answer:
C

question:
Depending on the cycle, washing a load of clothes takes from 22 to 28 minutes. Drying takes an additional 20 to 30 minutes. What are the minimum and maximum total times to complete a load of laundry?
(A)22 minutes and 28 minutes (B)28 minutes and 48 minutes (C)28 minutes and 58 minutes (D)42 minutes and 48 minutes (E)42 minutes and 58 minutes
answer:
E

question:
Alexis programmed her VCR to record for exactly 225 minutes. If it began recording at 9:05 A.M., at what time did it stop recording?
(A)11:30 AM (B)12:00 PM (C)12:30 PM (D)12:50 PM (E)1:00 PM
answer:
D