Question

In a class test (+3 marks) are given for every correct answer and (-2 marks) for every wrong answer and no marks for not attempting any question. Radhika scored 20 marks if she has got 12 correct answers, how many questions has she attempted incorrectly

Answer 1

Answer:PLEASE MARK MY ANSWER AS BRAINLIEST

Step-by-step explanation:

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

OR

i)(20-12)

 =8/2  =  4

ii)21+5  /

   =26/2

    =13

Answer 2

Answer:

Given,

Marks for each correct answer=+3

Marks for each wrong answer=-2

Marks for each unattempted answer=0

Now,

Marks scored by radhika=20

No. of correct answers=12

Marks scored by correct answers= 12×{+3}= 36

No. of incorrect answers=n

Now.

36+(-2n)= 20

-2n= 20-36

-2n= -16

n= 8

• Therefore, no. of incorrect answers= 8