in a competitive examinations ,5 marks are awarded for each correct answer,while 2 marks are deducted for each wrong answer. vidhya answered 120 questions and got 343 marks. How many questions did she answer correctly?
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let the number of correct answers be x
then no. of wrong answers = 120 - x
then correct answer's marks = 5x
and wrong answer's marks = -2(120 - x)
total marks = 343
A.T.Q(accordind to question)
5x+[-2(120 - x)] = 343
5x +(-240+2x) = 343
5x - 240 + 2x = 343
7x - 240 = 343
7x = 343 + 240
7x = 583
then no. of wrong answers = 120 - x
then correct answer's marks = 5x
and wrong answer's marks = -2(120 - x)
total marks = 343
A.T.Q(accordind to question)
5x+[-2(120 - x)] = 343
5x +(-240+2x) = 343
5x - 240 + 2x = 343
7x - 240 = 343
7x = 343 + 240
7x = 583
winie:
what is ×=?
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