Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

pythagoras123 Group Title

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
  • 2 years ago

  • This Question is Closed
  1. Eric_Playsinacoolway Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    assumeing that 15 correct ans...

    • 2 years ago
  2. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    she got 14 right 3 wrong and skipped 3

    • 2 years ago
  3. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    this makes total score of 67 :D

    • 2 years ago
  4. Eric_Playsinacoolway Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    good logic @hashsam1

    • 2 years ago
  5. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    14*5=70 right answers 3*2=6 wrong ones 70-6=64 as she had skipped 3 thus she was awarded 3 marks her total score 64+3=67 Thanks

    • 2 years ago
  6. marco26 Group Title
    Best Response
    You've already chosen the best response.
    Medals 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,,:)

    • 2 years ago
  7. hashsam1 Group Title
    Best Response
    You've already chosen the best response.
    Medals 2

    @marco26 can you solve that for us? :P

    • 2 years ago
  8. marco26 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    this is consistent with hashsam1 's answer

    • 2 years ago
  9. marco26 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    lol,, this can be done by gauss jordan reduction, or any convenient method,..anyway, the answer is already there :)

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.