In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer.
i) rohan answered all question and scored (-15) marks though he got 8 correct answer.
ii) smitha answered all question and scored (-15) marks though he got 3 correct ansewer.how many incorrect answer had they attempted.
Answers
Given : In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer.
i) rohan answered all question and scored (-15) marks though he got 8 correct answer.
ii) smitha answered all question and scored (-15) marks though he got 3 correct ansewer
To find : how many incorrect answer had they attempted.
Solution:
Rohan answered 8 answers correct
Mark for correct answers = 8 * 5 = 40
Total Mark = - 15
Marks for incorrect answers = 40 - (-15) = 55
Question incorrect answers attempted = 55/2 = 27.5
Smita answered 3 answers correct
Mark for correct answers = 3 * 5 = 15
Total Mark = - 15
Marks for incorrect answers = 15 - (-15) = 30
Question incorrect answers attempted = 30/2 =15
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for the first question the answer is 27.5 marks
for the second question the answer is 15 marks