Knowee
Questions
Features
Study Tools

In a test, 1 mark is awarded for each correct answer and one mark is deducted for each wrong answer. If a boy answers all 20 items of the test and gets 8 marks, the number of questions answered correct by him was:__________1614128

Question

In a test, 1 mark is awarded for each correct answer and one mark is deducted for each wrong answer. If a boy answers all 20 items of the test and gets 8 marks, the number of questions answered correct by him was:__________1614128

🧐 Not the exact question you are looking for?Go ask a question

Solution

Let's denote the number of correct answers as C and the number of wrong answers as W.

From the problem, we know that:

  1. The total number of questions is 20, so C + W = 20.
  2. For each correct answer, the boy gets 1 mark, and for each wrong answer, he loses 1 mark. So, the total score is C - W = 8.

We can solve these two equations simultaneously to find the values of C and W.

Adding the two equations, we get:

C + W + C - W = 20 + 8 2C = 28 C = 28 / 2 C = 14

So, the boy answered 14 questions correctly.

This problem has been solved

Similar Questions

In a class test containing 10 questions, 5 marks are awarded for every correct answer and (–2) marks are awarded for every incorrect answer and 0 for each question not attempted. Ravi gets 4 correct and 6 incorrect answer. What is his score? a) 8 b) 12  c) 14 d) 16

A test has 60 questions. A student scores 1 mark for a correct answer, –1/2 for a wrong answer and –1/4 for not attempting a question. If the net score of a student who attempted 48 questions is 33 marks, then how many questions did he get wrong?*1) 82) 123) 104) None of these

In a quiz, 4 marks were awarded for each correct answer and 3 marks were deducted for each wrong answer.No marks were awarded or deducted for unanswered questions.The following table shows the results of 2 pupils.However, some coffee was spilt on the result slip such that one of the numbers cannot be seen.How many unanswered questions did Billy have?

In a test, a candidate attempted only 8 questions and secured 50% marks in each of the questions. If he obtained a total of 40% in the test and all questions in the test carried equal marks, how many questions were there in the test?

In an exam, 4 children named A, B, C and D got the following percentage scores:A got 46%, B got 60%, C got 50% and D got 54%. The paper had a total of 50 questions with each question carrying equal marks.How many students among A, B, C and D got at least 26 questions correct?Note: There is no negative marks for incorrect attempts

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.