Question

Q5. There are 40 questions in the competitive exam. 2 marks are awarded for each correct answer, while 2 marks are deducted for each incorrect answer. Ridhima answered 17 questions correctly. If she attempts all questions, find the marks in the exam.​

Answer 1

★ Required Solution...

There are 40 Questions in the competitive exam and Ridhima attempted all the questions.

»2 marks are awarded for each correct attempt and 2 marks are deducted for each incorrect answers.

»Ridhima answered 17 questions correctly This means that she covered (17 × 2) +34 marks by his correctly attempt.

»Ridhima attempted (40 - 17) 23 Questions incorrectly. so her marks obtained by deduction will be ( -23 × 2) = -46 marks as Well.

Now Finally, We can join both obtained marks by Ridhima in the competitive examination as.

$\colon\implies{\tt{ (17 \times 2) + (-23 \times 2) }} \\ \\ \colon\implies{\tt{ 34 + (-46) }} \\ \\ \colon\implies{\tt{ 34 - 46 }} \\ \\ \colon\implies{\tt{ -12 \ Marks }}$

Hence,

Ridhima got -12 marks in an Examination reports of competition.

Answer 2

Answer:

Ridhima's mark in her exam is -12.

Step-by-step explanation:

Consider the provided information.

➪ Total no. of questions = 40

Out of 40 questions, Ridhima answered 17 questions correctly.

➪ Correctly Answered questions = 17

Therefore, Wrongly answered questions are:

➪ Wrongly answered questions = Total no. of questions - Correctly answered questions

➪ Wrongly answered questions = 40 - 17

➪ Wrongly answered questions = 23

As of now, we know that out of 40 questions in an exam, Correctly answered questions are 17 and wrongly answered questions are 23. Since, Wrongly answered questions are greater than the correctly answered questions, we can say that, marks obtained is less than zero(negative).

$\underline{\bf{\bigstar\:\:Marks\:obtained = Negative}}$

For each correctly answered question, two marks are awarded. That means:

➪ Marks obtained for answering correctly = No. of correctly answered question × Marks awarded

➪ Marks obtained for answering correctly = 17 × 2

➪ Marks obtained for answering correctly = 34 marks

For answering each question wrongly, 2 marks were reduced. That means:

➪ Marks obtained for answering wrongly = No. of wrongly answered question × Marks deducted

➪ Marks obtained for answering wrongly = 23 × (-2)

➪ Marks obtained for answering wrongly = -46 marks.

According to the question, we need to find Ridhima's total mark in exam:

➪ Ridhima's mark = Marks obtained by answering correctly + Marks obtained by answering wrongly.

➪ Ridhima's mark = 34 + (- 46)

➪ Ridhima's mark = 34 - 46

➪ Ridhima's mark = -12 marks

Therefore, Ridhima's mark in exam is -12.