Question

Q3. In a class test 4 marks were awarded for every correct answer, 2 marks are
deducted for every incorrect answer and no marks are given for not attempting
question. Ravi scored 20 marks. If he has got 8 correct answers, how many
questions has he attempted incorrectly?​

Answer 1

Answer:

Step-by-step explanation:

Question correctly attempted = 8 question incorrectly attempted = y

Marks for correct question= 8×4 =32

Marks for incorrect questions= -(y× 2)

Now according to question

32 + [-(2y)] =20

-2y = 20 - 32

-2y = -12

y = 6

Hence the question in correctly attempted are 6

Answer 2

Answer:

That's Your 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 .

Hope it's helpful