Question

in a class test containing 152 questions, 4 marks are given for every correct answer and (-2) marks are given for every incorrect answer.(a). Bharti attempt all questions but only 9 answers are correct .What is her total score?
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Answer 1

Answer:

Given that,

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

Let the number of correct answer = x

Number of incorrect answers = y

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

Case(1) Bharathi attempts all questions.

Number of correct answers = 9

Number of incorrect = 15 - 9 = 6

So, x = 9, y = 6

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

Case(2) Hema attempts only 5 questions. All are correct.

So, Number of correct answers = 5

Incorrect Answers = 0

x = 5, y = 0

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

Therefore, Bharathi score is 24 , Hema score is 20 .

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Answer 2

Answer:

-250

Step-by-step explanation

She got 9 answers correct and 143 answers wrong.

(9*4)+(143*-2)

36+(-286)

36-286

-250