objective question exam!!

Algebra Level 1

a man got a objective question paper ! if he give a right ans he will get 1 mark , if he give a wrong ans he will loose 0.5 mark .he gave all answer... ! after exam he got 29.5 mark . so how many ans was wrong and how many was wright??????

33 right 7 wrong 31 right 9 weong 34 wright 6 wrong 32 right 8 weong

Torikul Islam Piash by Torikul Islam Piash , 23, Bangladesh

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6 solutions

33-(0.5*7 )= 29.5

33 wright and 7 wrong answer is elected.

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Uttam Kakde
Nov 22, 2014

r=33, w=7 then wrong qustion deduct 0.5 mark then 7=3.5 ,r-w=ans 33-3.5=29.5

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Syed Ahsanuddin
Mar 31, 2014

33-(0.5*7)=29.5

33 wright and 7 wrong answer is elected.

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Priya Parade
Mar 16, 2014

33 right ans then he got 33 marks but his 7 wrong question then his reduce marks 7*0,5=3.5 then 33-3.5=29.5

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Since the total marks awarded were 29.5 and for every wrong answer 0.5 marks were deducted, the number of wrong answers have to be odd. From the options it can only be the ones containing 9 and 7 wrong. By simple subtraction: 33 - (7*0.5) we get 29.5, hence the right answer

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Nathan Pereira
Mar 15, 2014

Total Marks = 1 X (No of correct answers) - 0.5 X (No. of Incorrect answers). To get 29.5 marks, No. of correct answers = 33 and No. of incorrect answers = 7 . So from above equation we get (1 X 33) - (0.5 X 7) = 33 - 3.5 = 29.5

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ya its a correct....

Ritesh Rangari - 7 years, 2 months ago

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