A test consists of True or False questions. 1 mark is awarded for the correct answer and 1/4
mark is deducted for the wrong answer. If a student gets 80 marks and he answered 100 questions.
Q1) Find the total number of questions answered correctly and answered incorrectly.
Q2) find the total number of questions answered incorrectly if he gets 95 marks
Q3) If he answered 80 correctly and rest wrong how many marks did he get.
Answers
Answered by
1
Answer:
Step-by-step explanation:
x+y=100 —— (1)
x=100-y
x-1/4y=80
Substituting x for 100-y
100-y-1y/4=80
(400-4y-1y)/4 =80
-5y =320-400
-5y=-80
y=16
Putting y as 16 in eq 1
x+16=100
x=84
He got 84 questions right and 16 wrong
Similar questions