Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

In a class test 5 marks are given for every correct answer and -2 marks are given for every wrong answer. Tina attempted all the questions and scored 30

marks. If she gave wrong answers for 10 questions, then how many correct answers she attempted?(with steps)



This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let us say Tina has written correct answers to N questions.

Then total marks she has got : N * 5 - 2 * 10 = 5 N - 20  = 30

5 N = 20+30 = 50

N = 10

Tina attempted and gave 10 correct answers. there were totally 20 questions.

1 5 1
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts