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 2 years 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?
 2 years 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?

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Eric_Playsinacoolway
 2 years ago
Best ResponseYou've already chosen the best response.0assumeing that 15 correct ans...

hashsam1
 2 years ago
Best ResponseYou've already chosen the best response.2she got 14 right 3 wrong and skipped 3

hashsam1
 2 years ago
Best ResponseYou've already chosen the best response.2this makes total score of 67 :D

Eric_Playsinacoolway
 2 years ago
Best ResponseYou've already chosen the best response.0good logic @hashsam1

hashsam1
 2 years ago
Best ResponseYou've already chosen the best response.214*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

marco26
 2 years ago
Best ResponseYou've already chosen the best response.0Hmm, 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,,:)

hashsam1
 2 years ago
Best ResponseYou've already chosen the best response.2@marco26 can you solve that for us? :P

marco26
 2 years ago
Best ResponseYou've already chosen the best response.0this is consistent with hashsam1 's answer

marco26
 2 years ago
Best ResponseYou've already chosen the best response.0lol,, this can be done by gauss jordan reduction, or any convenient method,..anyway, the answer is already there :)
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