In an objective competitive exam, a correct answer score 4 marks and on a wrong answer 2 marks are negatively added. A student scores 420 marks from 150 question. How many answers were correct ?
A) 145
B) 138
C) 125
D) 120
Answers
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138 is a correct answer............... plz plz mark me as a brain list
Answered by
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D) 120.
If 150 questions are there in the paper and a student scores 420 marks from it, that means 120 answers were correct because for the 120 correct answers, the student will get 120X4 = 480 marks.
But, at the same time, 30 questions were wrongly answered.
That means for the 30 wrong answers, 30X2 = 60 marks were lost.
Hence, 480-60 equals 420. therefore, the correct answer is 120.
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