A student has 3 total hours available for studying every night. An op\'s profess
ID: 420761 • Letter: A
Question
A student has 3 total hours available for studying every night. An op's professor assigns her students 10 op's questions every day. After the student "prepares himself" to work on operations, each problem takes 6 minutes to complete. An accounting professor similarly assigns her students 10 questions every day, each of which takes 6 minutes to complete after the student is "prepared" to work on accounting. The student is "prepared" to immediately work on the next op's problem if he just completed an op's problem, and similarly he is "prepared" to immediately work on an accounting problem if the student just completed an accounting problem. Unless he just completed an op's problem, it takes the student 5 minutes to get prepared before tackling an op's problem, and similarly, unless he just completed an accounting problem it takes him 5 minutes to get prepared to tackle an accounting problem. The student likes variety - it is just too boring to do too many accounting problems in a row so the student would desperately like to switch back and forth between op's and accounting as frequently as possible and yet still get both sets of problems done in 3 hours. What should the student choose as the lot size?
1. 2 lots of 5
2. 10 lots of 1
3. 1 lot of 10
4. 5 lots of 2
Explanation / Answer
The student should choose lot size of 5 lots of 2. As he can switch op and accounting every 5 question and still be able to complete in 3 hours. Hence the correct option is 4. 5 lots of 2.
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