SOLUTION: Deepa did a mathematics test with a differt design. Each correct answer scored 8marks and each incorrect answer reduced the score by 4 marks. The test contained 30 questions,and a

Question 712095: Deepa did a mathematics test with a differt design.
Each correct answer scored 8marks and each incorrect answer reduced the score by 4 marks. The test contained 30 questions,and after completing it deepa had a score of zero. How many questions did she answered correctly?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Deepa did a mathematics test with a different design.
Each correct answer scored 8 marks and each incorrect answer reduced the score by 4 marks.
The test contained 30 questions, after completing it Deepa had a score of zero.
:
Poor Deepa, some days it just doesn't pay to get out of bed.
:
Let x = no. of right answers
then
(30-x) = no. of wrong answers
:
8x - 4(30-x) = 0
8x - 120 + 4x = 0
8x + 4x = 120
12x = 120
x = 120/12
x = 10 right answers
:
:
See of that checks out: (She got 20 question wrong)
8(10) - 4(20) =
80 - 80 = 0
RELATED QUESTIONS
Each correct answer scored 8 marks, and each incorrect answer reduced the score by 4... (answered by stanbon)

There were 15 questions in a Mathematics quiz. Cathy answered all 15 questions and scored (answered by ankor@dixie-net.com)

Dr. Smith's chemistry midterm has 60 questions. She scores the test as follows: for each... (answered by Mathtut)

David entered a quiz. For each correct answer three points were added; for each... (answered by mananth)

at a mathematics Quiz 30 problems were given. each correct answer earned 4 points and 2... (answered by macston)

Reggie receives three points for each correct answer on a test and loses one point for... (answered by lynnlo)

In the math contest of 20 problems 5 pts. were given for each correct answer and 2 points (answered by KMST)

An exam has 20 questions. It is scored by giving 10 points for each correct answer and... (answered by josmiceli)

In a Mathematics contest, a contestant was awarded 6 points for each correct answer but... (answered by nerdybill)