please tell this answer fast
There are 90 multiple choice questions in a test. Two marks are awarded for
every correct answer and one mark is deducted for every wrong answer. If
Sahana got 60 marks in the test while she answered all the questions, then how
many questions did she answer correctly?
Answers
Answered by
2
Answer:
Let the no. of correct answers be x.
Therefore, no. of incorrect answers = 90 - x
As per question
2 marks are awarded for correct answer and 1 mark is deducted from total score if the answer is incorrect
therefore, 2x - 1 (90 - x) = 60
2x - 90 + x = 60
3x - 90 = 60
3x = 90 + 60
3x = 150
x = 150 ÷ 3
50
therefore Anitha answered 50 questions.
Step-by-step explanation:
Answered by
1
Step-by-step explanation:
no of questions: 90
Mark's awarded for one correct answer: 2
Mark's deducted for one wrong answer:1
Mark's sahana got:60
Mark's she got correctly = 90÷2
= 45
I really hope I helped you
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