there are 180 multiple choice questions in a test. if a candidate gets 4 marks for every correctly answered question and for every unattempted or wrongly answered question one mark is deducted from the total score of correct answers. if the candidate scores 450 marks in the test how many questions did he answer correctly?
Answers
Answered by
39
4x-(180-x)=450
5x=450+180
5x=630
x=126
that means 126 answers were correct
5x=450+180
5x=630
x=126
that means 126 answers were correct
Answered by
32
"Number of questions that are answered correctly is 126.
Given:
180 multiple choice questions
4 marks for correct answer
1 mark deduction for wrong answer
He scores 450 marks
To find:
The correctly answered questions
Solution:
Let us considered the “correctly attempted questions” be “x”
so, the number of questions that are not attempted or wrong question = 180-x
“total marks” for “correct attempts” = 4x
and total marks for not attempted or wrong question = -1 (180-x)= x - 180
As
Total marks = sum of attempted and unattempt or wrong question
450 = 4x + x - 180
450 = 5x -180
630 = 5x
126 = x
Number of questions that are answered correctly is 126."
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