Question

180 multiple choice questions in a test a candidate gets 4 marks for every correct answer and for every wrongly answered questions one mark will declare looted from the total score of correct answers if candidate gets scored 450 marks in the test how many questions did he answered correctly​

Answer 1

Answer:

Let the number of correctly attempted questions be x

so, the number of unattempeted or wrong question = 180-x

total marks for correct attemptions = 4x

and total marks for unattempeted or wrong question = -1 (180-x)

= x - 180

as total marks = sum of attempted and unattempeted or wrong question = 180-x

450 = 4x + x - 180

450 = 5x -180

630 = 5x

126 = x

so, the number of correctly attempted question was 126.

Answer 2

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