There are 180 mcq in a test. 4 marks for correct answer and 1 marks deducted when unattempted or answered wrongly. If a candidate scores 450 marks, how many questions he answered corrrectly
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Answer:
Correct answer = 126
Incorrect answer = 54
Step-by-step explanation:
Total no. of questions:-180
correct answer = x
incorrect answers = y
x+y = 180
=>x = 180-y
so,
4(180-y)-(y)=450
=>720-4y-y=450
=>-5y = 450-720
=>5y =270
=>y=54
x=180-y = 180-54 =126
Hence,
Correct answer = 126
Incorrect answer = 54
Pls mark this as the Brainliest answer!!!
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