Question

In a class test containing 15 questions, 4 marks are given for every correct answer and (–2) marks are given for every incorrect answer.
(i) Gurpreet attempts all questions but only 9 of her answers are correct. What is her total score?
(ii) One of her friends gets only 5 answers correct. What will be her score?

Answer 1

Answer:

Gurpreet total score = 24

Step-by-step explanation:

Total  Questions = 15

Marks for correct answer = 4

Marks for incorrect answer = -2

Gurpreet attempts all questions = 15

Gurpreet correct answer = 9

Gurpreet correct answer score = 9 * 4 = 36

Gurpreet incorrect Answer = 15 - 9 = 6

Gurpreet incorrect answer score = 6 * (-2) = -12

Gurpreet Total Score = 36 - 12 = 24

only 5 answers correct.  ( if attemped only 5)

Then Freind score = 5 * 4 = 20

if attempted 15

then friend score = 5 * 4  + (15-5)*(-2)  =  20 - 20 = 0

Answer 2

Answer:

i) Total Score of Gurpreet = 24

ii) Total Score of her friend = 0

Step-by-step explanation:

In the question,

Total number of questions in the test = 15

Marks given for a correct answer = 4

Marks deducted for incorrect answer = 2

i)

Questions attempted by Gurpreet = 15

Correct answers = 9

So,

Total Score is given by,

Total Score = (Mark for one correct answer) x (Number of correct answers) - (Marks deducted for incorrect answer) x (Number of incorrect answers)

So,

Total Score = (4)(9) - (2)(6) = 36 - 12

Total Score of Gurpreet = 24

ii)

Questions attempted by her friend = 15

Correct answers = 5

So,

Total Score is given by,

Total Score = (Mark for one correct answer) x (Number of correct answers) - (Marks deducted for incorrect answer) x (Number of incorrect answers)

So,

Total Score = (4)(5) - (2)(10) = 20 - 20

Total Score of her friend = 0