In a competitive examination, one mark is awarded for each correct answer while 1/2 mark is deducted for every wrong answer. Jayanti answered 120 questions and got 90 marks. How many questions did she answer correctly?
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Answer:
X=60,Y=60
Step-by-step explanation:
let the correct answer be x and the incorrect answer be y.
then, X + Y=120 and X+1/2Y=90
X+Y=120 and 2X+Y=180
Now, subtract these both equation ,we get
X=60 and Y=60
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