In a competitive test 180 multiple choice questions were given. A candidate gets 4 marks for each correct answer and for every un attempted or wrongly answered question one mark is deducted from the total score of correct answers. If a candidate scored 450 marks in the test ii) How many questions did he answer wrongly?
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Step-by-step explanation:
first let us find total number of questions he answered correctly
so, let the no. of questions he answered be x
now, 450=4x+x-180
450=5x-180
5x=450+180
5x=630
x=630/5
x=126
Now, let us find total questions he answered wrongly
so, total no. of questions - total no. of questions he answered correctly
= 180-126
=54
hence, 54 questions he answered wrongly.
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