SOLUTION: in a quiz program right answer gets 2 mark each. wrong answer gets 1 mark deducted. there are total 50 questions. if a student gets 76 marks. how many questions are right? find the
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Question 1012398: in a quiz program right answer gets 2 mark each. wrong answer gets 1 mark deducted. there are total 50 questions. if a student gets 76 marks. how many questions are right? find the answer in linear equation method Answer by macston(5194) (Show Source):
You can put this solution on YOUR website! .
R=number of right answers; W=number of wrong answers
.
R+W=50
R=50-W
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Total score = 2R-W
76=2R-W
76=2(50-W)-W
76=100-3W
-24=-3W
8=W
ANSWER 1: There are 8 incorrect answers.
.
R=50-W=50-8=42
ANSWER 2: there are 42 correct answers.
.
CHECK:
2R-W=76
2(42)-8=76
84-8=76
76=76
