13.There are 180 multiple choice questions in a test. A candidate gets

1.	13.There are 180 multiple choice questions in a test. A candidate gets 4 marks for everycorrect answer, and for every un-attempted or wrongly answered questions one mark isdeducted from the total score of correct answers. If a candidate scored 450 marks in thetest how many questions did he answer correctly?
Answer» Answer: x=126 Step-by-step explanation: 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.

13.There are 180 multiple choice questions in a test. A candidate gets 4 marks for everycorrect answer, and for every un-attempted or wrongly answered questions one mark isdeducted from the total score of correct answers. If a candidate scored 450 marks in thetest how many questions did he answer correctly?

Answer»

Answer:

x=126

Step-by-step explanation:

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.