Question 6(i)
In a class test (+3) marks are given for every correct answer and (−2) marks are given for every incorrect answer and no marks for not attempting any question.
(i) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly?

Open in App

Solution

Marks obtained for 1 right answer = +3
Marks obtained for 1 wrong answer= -2
i) Marks scored by Radhika =20
Marks obtained for 12 correct answers = 12 $\times$ 3 = 36
Marks obtained for in correct answers = Total score - Marks obtained for 12 correct answers
= 20 - 36 = -16
Marks obtained for 1 wrong answer= -2
Thus, number of incorrect answers = (-16) $\div$ (-2) = 8 Therefore, she attempted 8 questions wrongly.

Suggest Corrections

Similar questions

Q. In a class test (+3) marks are given for every correct answer and (–2) marks are given for every incorrect answer and no marks for not attempting any question. Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly?

Q. Question 6(ii)
In a class test (+3) marks are given for every correct answer and (−2) marks are given for every incorrect answer and no marks for not attempting any question.
(ii) Mohini scores −5 marks in this test, though she has got 7 correct answers. How many questions has she attempted incorrectly?

Q. In a class test (+3) marks are given for every correct answer and (−2) marks are given for every incorrect answer and no marks for not attempting any question. Rakesh scores 18 marks by attempting16 questions. How many questions has he attempted correctly and how many has he attempted incorrectly? [4 MARKS]

Question 132

In a test, +3 marks are given for every correct answer and - 1 mark is given for every incorrect answer. Sona attempted all the questions and scored +20 marks, though she got 10 correct answers.
How many incorrect answers has she attempted?
How many questions were given in the test?

Q. Question 6(iii)
In a class test (+3) marks are given for every correct answer and (−2) marks are given for every incorrect answer and no marks for not attempting a question. Rakesh scores 18 marks by attempting 16 questions. How many questions has he attempted correctly and how many has he attempted incorrectly?

Join BYJU'S Learning Program

Explore more

Properties of Multiplication of Integers

Standard VII Mathematics

Join BYJU'S Learning Program

Question 6(i) In a class test (+3) marks are given for every correct answer and (−2) marks are given for every incorrect answer and no marks for not attempting any question. (i) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly?

Question 6(i)
In a class test (+3) marks are given for every correct answer and (−2) marks are given for every incorrect answer and no marks for not attempting any question.
(i) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly?