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1. In an examination there are 60 multiple choice question. For every right answer 1 point is added and for every wrong answer 0.25 points are deduted from the total. No point added or deducted for any unanswered question. An applicant answered 75% of the total number of questionsand got a total point of 30. How many answeres of the applicant were correct?
- A. 28
- B. 28
- C. 28
- D. 28
Answer: Option B
Explanation:
Let the number of correct answers be X.
Total number of questions answered = 75% of 60 = 45
Now, X - (45 - X)×0.25 = 30
or, X - 45×0.25 + 0.25X = 30
or, 1.25X = 30 + 0.45×25 = 30 + 11.25 = 41.25
or, X = 41.25/1.25 = 33
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