please solve it 7th.
Attachments:
Answers
Answered by
1
x = no of correct answer
y = incorrect
x+y = 120
x-0.5y = 90
__________
1.5y = 3p
y = 20
so.
x=100
she answer 100 questions correctly
y = incorrect
x+y = 120
x-0.5y = 90
__________
1.5y = 3p
y = 20
so.
x=100
she answer 100 questions correctly
Answered by
3
hey dear,
here is your answer,
_____________
Let x be the no of correct answers and y be that of wrong answers.
x+y=120 (total - 120 qns)
= x=120-y----(1)
x-0.5y=90--(2)
Substituting 1 in 2
120-y-0.5y=90
-1.5y=-30
y=-30/-1.5=20
(1) x=100
No of correct answers: 100
______________
Hope it helps u !!!
Cheers ☺☺
# Nikky
here is your answer,
_____________
Let x be the no of correct answers and y be that of wrong answers.
x+y=120 (total - 120 qns)
= x=120-y----(1)
x-0.5y=90--(2)
Substituting 1 in 2
120-y-0.5y=90
-1.5y=-30
y=-30/-1.5=20
(1) x=100
No of correct answers: 100
______________
Hope it helps u !!!
Cheers ☺☺
# Nikky
Similar questions