Question

5. In a class test (+4) marks are given for every correct answer and (-2) for every incorrect answer.

i)
Niharika answered all the questions and scored 20 marks though she got 10 correct answers. Find
the number of incorre
of the questions she attempted
(ii)
Amitesh also answered all the questions and scored (-10) marks though he got 15 incorrect

Answer 1

Answer:

a) 10

b) 5

Step-by-step explanation:

please mark me a brain list

Answer 2

Answer:

Step-by-step explanation:

The answer is given below :

No. of correct answers = 25

So, marks secured = 25 × 4 = 100

Let, he did x no. of incorrect answers.

So, marks be cut = x × (-2) = -2x

Thus,

100 - 2x = 68

=> 2x = 100 - 68

=> 2x = 32

=> x = 16

So, Rohit did 16 incorrect answers and in total he attempted (25 + 16) = 41 questions.

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