Comprehension Passage
Directions: Read the data carefully and answer the following questions.
Three individuals, A, B, and C, were given a set of questions. They attempted some of them. The number of questions attempted by B is 50% of the total questions he was given. A was given 20 fewer questions than B. C was given 130 questions. The combined number of questions attempted by A and C is 145. The total number of questions given to all three is twice the total number of questions they attempted. Additionally, the number of questions attempted by B and C is the same.
If C scored 70 marks, with 1 mark awarded for each correct answer and a penalty of 1/4th mark for each incorrect answer, how many questions did C answer incorrectly?
1
8
2
10
3
16
4
25
5
20