Sona and Mona took and exam of 50 questions in which plus one mark was given for every correct answer of for an incorrect 1 and 0 for and unattended question Muna attempted all question and answers of you in correctly but Shona in Answer all attempted questions correctly if there is scores are the same maximum how for how many questions can Sona answer
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Answer:
48
Step-by-step explanation:
given Sona attempted questions all are correct,
Let, Sona marks=Sona ateempted = x
Mona attempted all 50questions
Let,Mona correct answers =y
Mona incorrect answers= 50-y
Now,Mona marks= (+1)y +(-1)(50-y)
= 2y-50
Given Mona marks = Sona marks
=>2y-50 =x
Now ,maximum of x is at y=49,x is maximum (y<50)
x=2(49)-50
x=48
48
Step-by-step explanation:
given Sona attempted questions all are correct,
Let, Sona marks=Sona ateempted = x
Mona attempted all 50questions
Let,Mona correct answers =y
Mona incorrect answers= 50-y
Now,Mona marks= (+1)y +(-1)(50-y)
= 2y-50
Given Mona marks = Sona marks
=>2y-50 =x
Now ,maximum of x is at y=49,x is maximum (y<50)
x=2(49)-50
x=48
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