13. There are 180 multiple choice questions in a test. A candidate gets 4 marks for every
correct answer, and for every un-attempted or wrongly answered questions one mark is
deducted from the total score of correct answers. Ifa candidate scored 450 marks in the
test how many questions did he answer correctly?
Answers
Answered by
11
Answer:
There are 180 multiple choice questions in a test. A candidate gets 4 marks for every
correct answer, and for every un-attempted or wrongly answered questions one mark is
deducted from the total score of correct answers. Ifa candidate scored 450 marks in the
test how many questions did he answer correctly?
Step-by-step explanation:
...........
Answered by
2
Answer:
Therefore, 128 questions are answered correct.
Step-by-step explanation:
Let the number of correctly answered questions be x.
Let the wrongly answered questions be y.
Then,according to the question,
x+y=180 and 4x−y=450
Adding these two equations,
x+y+4x−y=450+180
5x=630
x=126
From the above equation,
126+y=180
y=54
Therefore, 126 questions are answered correctly
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