In a class test containing 20 questions, 4 marks are given for every correct answer and
(−2) marks are given for every incorrect answer.
i)Ranita attempts all questions and 12 of her answers are correct. What is her total score?
ii)Rohit attempts all the questions but his 15 are correct. What is Rohit’s score?
Answers
Step-by-step explanation:
Given:-
In a class test containing 20 questions, 4 marks are given for every correct answer and (−2) marks are given for every incorrect answer.
To find:-
i)Ranita attempts all questions and 12 of her answers are correct. What is her total score?
ii)Rohit attempts all the questions but his 15 are correct. What is Rohit’s score?
Solution:-
Total number of questions in the test =20
Marks given for corrected answer = 4 marks
Marks given for incorreced answer = (-2) marks
Correct answered questions of Ranita = 12
Marks scored by her = 12×4 = 48 marks
Total number of questions Ranita attempted = 20
Wrong answered questions = 20-12 = 8
Marks for 8 incorrect answers = 8×(-2)=-16 marks
Total marks she scored = 48+(-16)
=> 48-16
=> 32
Total score of Ranita = 32 marks
ii) Rohit attempted all Questions
Correct answered questions = 15
Total marks for correct answers = 15×4 = 60 marks
Number of wrong answered questions = 20-15=5
Total marks for incorreced answers = 5×(-2)
=> -10 marks
Total his score = 60+(-10)
=>60-10
= 50 marks
Answer:-
Total score of Ranita = 32 marks
Total score of Rohit = 50 marks
Rohit got more marks than Ranita