In a test , (+4) marks are given for every correct answer and (-2) marks for every wrong answer, Rohit answered all the questions and scored 68 marks. 25 of Rohit answer correct how many of the questions we attempt were incorrect.
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Answer:
Step-by-step explanation:
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.
Answered by
2
Step-by-step explanation:
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.
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