Question

There are 140 multiple choice questions in a test A candidate gets 3 marks for every correct answer and for every un attempted or wrongly answered questions 2 marksis deducted from the total score of correct Answer. if a candidate scored 340 marks in the test how many questions did he answer correctly??​

Answer 1

Step-by-step explanation:

Let the number of correctly answered questions be x.

Let the wrongly answered questions be y.

Then,according to the question,

x+y=180 and 4x−y=450

Adding these two equations,

x+y+4x−y=450+180

5x=630

x=126

From the above equation,

126+y=180

y=54

Therefore, 126 questions are answered correctly

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