In an examination there were 50 multiple choice question, For every right answer 1 point is added and for every wrong answer 0.25 points are deducted from the total. No point is added or deducted for any unanswered question. An applicant answered 80% of the total number of questions and got a total point of 35. How many answers of the applicant were wrong?
Created: 6 years ago |
Updated: 2 years ago
best des
Let the number of wrong answers be N.
Number of questions answered = 80% of 50 = 80/100 of 50 = 40
Then, the number of correct answers = 40 - N
Therefore, (40 - N)×1 - N×0.25 = 35
or, 40 - N - 0.25N = 35
or, N + 0.25N = 40 - 35
or, 1.25N = 5
or, N = 5/1.25 = 4
Md Azizur Rahman
Founder of Satt
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