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There are 20 questions in a quiz. 5 marks are awarded for each correct answer, 2 marks are deducted for each wrong answer and 1 mark was awarded if the question was not attempted. Sophia got 67 marks altogether. How many questions did she get correct?
 one year ago
 one year ago
There are 20 questions in a quiz. 5 marks are awarded for each correct answer, 2 marks are deducted for each wrong answer and 1 mark was awarded if the question was not attempted. Sophia got 67 marks altogether. How many questions did she get correct?
 one year ago
 one year ago

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Eric_PlaysinacoolwayBest ResponseYou've already chosen the best response.0
assumeing that 15 correct ans...
 one year ago

hashsam1Best ResponseYou've already chosen the best response.2
she got 14 right 3 wrong and skipped 3
 one year ago

hashsam1Best ResponseYou've already chosen the best response.2
this makes total score of 67 :D
 one year ago

Eric_PlaysinacoolwayBest ResponseYou've already chosen the best response.0
good logic @hashsam1
 one year ago

hashsam1Best ResponseYou've already chosen the best response.2
14*5=70 right answers 3*2=6 wrong ones 706=64 as she had skipped 3 thus she was awarded 3 marks her total score 64+3=67 Thanks
 one year ago

marco26Best ResponseYou've already chosen the best response.0
Hmm, I guess this is the equation ,, :) not sure, though 5x + y 2z = 67 x + y + z = 20 Let x be the no. of correct answer, y be the skiipped answer, z be the wrong no...and solve,,:)
 one year ago

hashsam1Best ResponseYou've already chosen the best response.2
@marco26 can you solve that for us? :P
 one year ago

marco26Best ResponseYou've already chosen the best response.0
this is consistent with hashsam1 's answer
 one year ago

marco26Best ResponseYou've already chosen the best response.0
lol,, this can be done by gauss jordan reduction, or any convenient method,..anyway, the answer is already there :)
 one year ago
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