in a test +3 marks are given for each correct answer and -1 for every incorrect answer. sona attempted all the questions and scored +20 marks though she got 10 correct answers. 1. how many incorrect answers has she attempted? 2. how many questions were given in the test?
Answers
Answered by
3
marks given for every correct answer = 3
marks deducted for every incorrect answer = -1
sona attempted all the questions
she scored = 20
but she attempted = 10 correct answers
10 * 3 = 30
30-20 = 10
10 * -1 = -10
therefor she got incorrect marks = 10
total questions = 30 ( 20+10)
marks deducted for every incorrect answer = -1
sona attempted all the questions
she scored = 20
but she attempted = 10 correct answers
10 * 3 = 30
30-20 = 10
10 * -1 = -10
therefor she got incorrect marks = 10
total questions = 30 ( 20+10)
Similar questions