Question

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

incorrect answer.

i. Lahari answered all the questions and scored 20 marks though she got 10

correct answers. Find no. of incorrect answers of the questions she attempted.​

Answer 1

Answer:

this is one example check this and do

Step-by-step explanation:

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. (i) Radhika scored 20 marks. If she has got 12 correct answers, how many questions has she attempted incorrectly? (ii) Mohini scores (–5) marks in this test, though she has got 7 correct answers. How many questions has she attempted incorrectly?

ans

1) radhika scored 36 marks.

final score of radhika is 20.

she got 16 marks negative.

therefore she made 8 incorrect answer.

2) mohini scored 21 marks.

final score of radhika is -5.

she got 26 marks negative.

therefore she made 13 incorrect answer.

Answer 2

Answer:

Marks given for one correct answer=4

So,marks given for 10 correct answers=4x10=40

Lahari's score=20

Marks obtained for incorrect answers=20-40=-20

Marks given for one correct answer=(-2)

Therefore,number of incorrect answers=(-20)÷(2)=10

So, Lahari got 10 incorrect answers