Question

2. In an exam, there is 1 mark for a correct answer,

-1/2for an incorrect answer, and -1/4


an unattempted question. If there are 120 questions and Sudha got 5 marks, what is the
maximum number of incorrect answers possible?​

Answer 1

Answer:

1/2 for an incorrect answer and minus 1/4

and an attempted question if there are 120 question and Sudha got 5 marks what is the maximum number of incorrect answer possible

Answer 2

ANSWER

Let x be the number of correct answers and y be the number of wrong answers.

Since Jayanti answered 120 questions therefore, x+y=120 that is

x=120−y..........(1)

Also, it is given that one mark is awarded for each correct answer while

2

1

mark is deducted for every wrong answer and Jayanti got 90 marks, therefore,

x−0.5y=90..........(2)

Substituting the value of equation 1 in equation 2:

120−y−0.5y=90

−1.5y=−30

y=20

Therefore,

x=120−20=100

Hence, she answered 100 questions correctly.