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's answers were correct. How many of the the questions he attempted were incorrect?
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marks for correct answer = +4
marks for incorrect answer= -2
No.of correct answers = 25
No.of incorrect answers be 'X'
No.of marks secured by Rohit =68
25×4 - R×(-2) = 48
100 - 2R = 48
100-48 = 2R
52 = 2R
52/2 = R
26 = R = incorrect answers
marks for incorrect answer= -2
No.of correct answers = 25
No.of incorrect answers be 'X'
No.of marks secured by Rohit =68
25×4 - R×(-2) = 48
100 - 2R = 48
100-48 = 2R
52 = 2R
52/2 = R
26 = R = incorrect answers
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0
Answer:
Step-by-step explanation:marks for correct answer = +4
marks for incorrect answer= -2
No.of correct answers = 25
No.of incorrect answers be 'X'
No.of marks secured by Rohit =68
25×4 - R×(-2) = 48
100 - 2R = 48
100-48 = 2R
52 = 2R
52/2 = R
26 = R = incorrect answers
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