In a competitive examination, 6 marks are awarded for every correct answer and 3 marks are deducted for every wrong answer
and 0 marks are given for not answering a question. There are 12 questions for each candidate to answer:
a. Sohail gets 7 correct answers and 5 wrong answers. Find his score.
b. Mahi gets 4 correct answers and the remaining wrong. What is her score?
c. Prithvi attempts only 10 questions and gets only 6 correct answers. What is his score? with method
Answers
Answer:
Given,
6 marks are awarded for correct answers, 3 marks are deducted for wrong answers and 0 marks for not answering.
a. No. of correct answers = 7
No. of points for correct answers = 7 x 6. = 42 points
No. of wrong answers = 5
No. of points for wrong answers = 5 x -3 = -15 points
Total points = 42 + (-15)
= 42 - 15
= 27 points
∴ Sohail's score = 27 points
b. No. of correct answers = 4
No. of points for correct answers = 4 x 6. = 24 points
No. of wrong answers = 12 - 4 = 8 (Since, she attempted 12 qns and got 4 qns correct )
No. of points for wrong answers = 8 x -3 = -24 points
Total points = 24 + (-24)
= 24 - 24
= 0 points
∴ Mahi's score = 0 points
c. No. of correct answers = 6
No. of points for correct answers = 6 x 6. = 36 points
No. of wrong answers = 10 - 6 = 4 ( Since, he attempted only 10 qns out of which he got 6 correct )
No. of points for wrong answers = 4 x -3 = -12 points
Total points = 36 + (-12)
= 36 - 12
= 24 points
∴ Prithvi's score = 24 points
Answer:
Step-by-step explanation: