Question

In a CET exam (+2) marks are given for every correct answer and (–0.5) marks for incorrect answer and 0 for not attempting. Likitha score 30 marks . If she got 20 correct answer. How many questions she attempted correctly

Answer 1

Answer:

20 wrong answers

Step-by-step explanation:

No. of correct answers = 20

Marks for each correct answer = 2

Marks for correct answers = 2*20 = 40

Marks for incorrect answers = Total Marks - Marks for Correct Answers

                                               = 30 - 40 = -10

Marks for each incorrect answer = -0.5

No. of incorrect answers =   Marks for incorrect answers      

                                            Marks for each incorrect answer  

                                         = -10 / -0.5

                                         = 20

                                       

Answer 2

Answer:

20 wrong answers.

Step-by-step explanation:

No. of correct answers =20

Marks for each correct answers=2×2=40

Marks for incorrect answers =Total marks

-marks for correct answers

=30-40=-10

Marks for each incorrect answer =-0.5

No. of incorrect answers=Marksforincorrectanswers

Marks for each incorrect answer

=-10/-0.5

=20