in a test (+4) marks are given for every correct answer and (-2)marks for every wrong answer.Rot answered all the questions and scored 68 marks .25 of Rot's answer were correct .How many of the questions he attempted were incorrect?
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total correct answers =25
1 correct answer=4
total marks=25×4=100
marks scored =68
incorrect answers=100-68=32
1 incorrect answer=2
32 incorrect answer=32÷2=16
he gave 16 incorrect answers
1 correct answer=4
total marks=25×4=100
marks scored =68
incorrect answers=100-68=32
1 incorrect answer=2
32 incorrect answer=32÷2=16
he gave 16 incorrect answers
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