Question

3. There are 180 multiple choice questions in a test. A candidate gets 4 marks for every
scorrect answer, and for every un-attempted or wrongly answered questions one mark is
Le deducted from the total score of correct answers. Ifa candidate scored 450 marks in the
test how many questions did he answer correctly?
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Answer 1

Answer:

Maximum marks = 180×4

= 720

total marks deducted = 720-450 = 270

for every wrong or unattempted answer 4+1 i.e. 5 marks

are deducted

Number of unattempted or wrong answers = 270/5

= 54

Number of correct answers = 180-54

= 126

Answer 2

Answer:

Let the no. of correct ans be X

450=4x + x - 180

450=5x - 180

450+180=5x

630=5x

630/5=x

126=x

he attempted 126 correctly.

Hope this will be helpful