Question

somaya took a test which has 20 questions. the total grade was computed by awarding 10 points for each correct answer and deducted 5 points for each incorrect answer. he answered all 20 questions and received a score of 125. how many wrong answer did he have ?​

Answer 1

Answer:

Marks he scored = 125

Marks he lost = 75

Marks deducted for 1 wrong answer = 5

Number of wrong answers if 5 marks are deducted = 1

Number of wrong answer if 1 mark is deducted = 1/5

Number of wrong answers if 75 marks are deducted = 75 * 1/5 = 15

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