Question

Q7. In a class test containing 15 questions, 4marks are given for every correct answer and (-2) marks
given for every incorrect answer.
Aditi attempts all questions but only 9 of her answers are correct. What is her total score?
Her friend gets only 5 answers correct. What is her score?​

Answer 1

Answer:

here it is,

Step-by-step explanation:

Given that,

In a class test containing 15 questions, 4marks are given for every correct answer and (-2) marks

given for every incorrect answer.

Let the number of correct answer = x

Number of incorrect answer= y

marks obtained by the student= 4(x)- 2y

case1- Aditi attempts all questions

no.of correct answer= 9

no. of incorrect answer= 15-9=6

so, x=9 , y= 6

total score= 4x-2y =4(9)- 2(6)= 36-12= 24

Case2- her friend attempts only 5 questions.

so, no. of correct answer= 5

no.of incorrect answer= 0

so,x=5 , Y=0

total score= 4x-2y=4(5)-2(0)= 4(5)= 20

therefore, aditi score is 24 and her friend score is 20....

hope it helps

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