In a Maths exam, two marks are given for every correct answer and one negative mark for every
ncorrect answer. If Sushmita gets 48 correct answers and her score is 84, how many questions
lid she answer correctly?
Answers
Answered by
1
The answer is given below :
No. of correct answers = 25
So, marks secured = 25 × 4 = 100
Let, he did x no. of incorrect answers.
So, marks be cut = x × (-2) = -2x
Thus,
100 - 2x = 68
=> 2x = 100 - 68
=> 2x = 32
=> x = 16
So, Rohit did 16 incorrect answers and in total he attempted (25 + 16) = 41 questions.
Thank you for your question.
Read more on Brainly.in - https://brainly.in/question/3542188#readmore
No. of correct answers = 25
So, marks secured = 25 × 4 = 100
Let, he did x no. of incorrect answers.
So, marks be cut = x × (-2) = -2x
Thus,
100 - 2x = 68
=> 2x = 100 - 68
=> 2x = 32
=> x = 16
So, Rohit did 16 incorrect answers and in total he attempted (25 + 16) = 41 questions.
Thank you for your question.
Read more on Brainly.in - https://brainly.in/question/3542188#readmore
Similar questions