Ravi took a test which has 50 questions. The total grade was computed by awarding 10 points for each correct answer and deducted 5 points for each incorrect answer . He answered all 50 question and received a score of 350. How many wrong answer did he attempt.
Answers
Answered by
1
Answer:
The number of wrong answers he attempted is 10.
Step-by-step explanation:
let x be correct answers
let y be wrong answers
therefore,
10x - 5y=350 --(1)
x + y =50 ----(2)
------------------------
(1) --- 10x - 5y = 350
(2) x 10 --- 10x + 10y=500
(-) (-) (-)
---------------------------------------
-15y=-150
15y=150
y=150/15
y=10
Therefore, The number of wrong answers he attempted is 10.
Answered by
0
Answer:
15
Step-by-step explanation:
10 points for 1 correct answer so ravi answered 35 questions correct so his Mark's are 350 and he answered 15 wrong questions because 50-35 = 15
Plz mark as brainliest plz plz
Similar questions