please solve 57 question
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Answer:
(B) 45
Step-by-step explanation:
total number of questions = 50
correct answer = 3
wrong answer = -2
Total score = 125
Define x:
Let x be the number of correct answer
Number of wrong answer = (50 - x)
Solve x:
3x - 2(50 - x) = 125
3x - 100 + 2x = 125
5x - 100 = 125
5x = 225
x = 45
Find the number of questions he answered correctly:
Number of correct answer = x = 45
Answer: (B) 45 answers.
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