Comprehension Passage
Directions: Study the chart carefully and the questions that follow.
Four trainers A, B, C and D take classes in a month. The pie chart shows the total hours of classes taken by all four trainers.
Total hours = 60
Note : (1) They can take classes for 1 hour (Basic class). 2 hours (Regular class) and 3 hours (Advance class). No trainer can leave class before time and cant take class before time and cant take class for any extra time.
(2) D doesn't take any regular class. He will take either Basic or Advance class.
Next month D takes 10 hours of classes. If the number of basic classes taken by D next month is twice the advance classes then find the difference between basic and advance classes taken by him.
1
1
2
2
3
3
4
4
5
5