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.
(7) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she
attempted incorrectly?
Mohini scores-5 marks in this test though she has got 7 correct answers. How many questions
has she attempted incorrectly?
Gü Rakesh scores 18 marks by attempting 16 questions. How many questions has he attempted
correctly and how many questions has he attempted incorrectly?
Answers
Answered by
3
Answer:
Radhika- 8 incorrect
Mohini- 8 incorrect
Rakesh- 10 correct and 6 incorrect
Step-by-step explanation:
Radhika - gets 12*3=36 marks and loses 36-20=16 marks, so incorrect answers: 16/2=8
Mohini - gets 7*3=21 marks and loses 21-5=16 marks, so incorrect answers: 16/2=8
Rakesh - gets 18 marks for 16 questions, this is possible by getting 10 correct and 6 incorrect answers: 3*10-6*2=18
Similar questions