Question

9. In a
answers did she get ?
test. (+ 5) marks are given for every correct answer and (-2) marks
are given for every incorrect answer. Rosy attempted all the questions and
scored (+65) marks though she got 15 correct answers. How many incorrect​

Answer 1

Step-by-step explanation:

marks given for every correct answer=5

marks given for every incorrect answer = (-2)

questions which she corrected=15 questions

question she incorrected = x

mark she had given for correct answer= 15×5=75marks

marks she had given for in correct answer = x×(-2)=(-2x)

total marks she had got = correct answer + incorrect answer

65marks = 75+(-2x)

65-75 =(-2x)

-10 =(-2x)

-10/-2 =x

5 =x

incorrect marks= (-2x)

= -2×5

=(-10)

incorrect questions =5 ques

Answer 2

Answer:

Total score of Rosy : 65

Number of correct answer : 15

Total score for correct answer : 15×5=30

: 30-65

: - 35

: (-35) ÷ (-2)

: 17.5 ( but you can

ignore. 5 and write only

17.

Number of incorrect answers : 17

Step-by-step explanation:

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