In a 3-hr examination of 320 questions, there are 40 mathematics problems. if twice as much time should be allowed for each mathematics problems as for each of the other questions, how many minutes should be spent on mathematics problems?
Accepted Solution
A:
Total questions = 320 Total mathematics problems = 40 Total non-mathematics problem = 320 - 40 = 280
Twice the amount of time is needed for mathematics problem. 40 x 2x + 280 x = 3 hours 80x + 280x = 3 hours 360x = 180 mins x = 0.5 mins 2x = 0.5 x 2 = 1 min
Answer: 1 min should be spent on Mathematics problems