In a class test, +4 marks were awarded for the correct answers and -1 mark for the wrong answers. Student scores 40 marks. If his correct answers were 11, find his wrong answers.
Answers
Answer:
Given:-
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀According to the Question
It is given that in class test 4 marks were awarded for every correct answer , 2 marks were deducted for every incorrect answer & No marks were given for not attempting question .
No. of Marks Scored by Ravi = 20
No. of Correct answer given by him = 6
We have to calculate the No. of Question has he attempted incorrectly ? So, Let's Start
:\implies:⟹ Actual marks obtained by Ravi in giving correct answer = 12 × 3 = 36
But marks obtained by him = 20
Therefore,
→ marks cut in attempting incorrect Question = 36- 20
→ marks cut in attempting incorrect Question = -16
And , also the marks deducted for each incorrect answer is -2 . So ,
:\implies:⟹ The number of incorrect answer given by him = -16/-2
:\implies:⟹ The number of incorrect answer given by him = 16/2
:\implies:⟹ The number of incorrect answer given by him = 8
So , the number of questions he has attempted incorrectly was 8 .
Marks for correct answer = 56 Marks for wrong answer = -20 Total answer = 56 + (-20)
= 56-20
= 36.
No.of correct answers Marks for correct
answer / 2
=> 56/2
= 28
No.of wrong answers = Marks for wrong
answers/ -1
=> -20 / -1
=> 20
Marks for correct answer = 56 Marks for wrong answer = -20 Total answer = 56 + (-20)
= 56-20
= 36.
No.of correct answers Marks for correct
answer / 2
=> 56/2
= 28
No.of wrong answers = Marks for wrong
answers/ -1
=> -20 / -1
=> 20