Question

in a class test containing 10 questions 3 marks are awarded for every correct answer and -1 marks for every incorrect answer and 0 question not attempt.

(i)gopi gets 5 correct and 5 incorrect. find his score
(ii)reshma gets 7 correct and 3 incorrect answers.what is her score
(iii) rashmi gets 3 correct and 4 incorrect answers out of seven questions she attempts. what is her score

Answer 1

Step-by-step explanation:

1)10

2)2)19

3(5

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Answer 2

Step-by-step explanation:

Given,

Total no. of questions = 10

Marks awarded for every correct answer = 3

Marks deducted for every incorrect answer = -1

Marks for no questions attempted is = 0

Total marks awarded for all correct = 10 × 3 = 30

Hence,

(i) No. of correct questions = 5

Marks awarded = 5 × 3 = 15

No. of incorrect questions = 5

Marks deducted = 5 × (-1) = -5

Score made by Gopi = 15 - 5 = 10 =$\frac{10}{30}$ (Ans)

(ii) No. of correct questions = 7

Marks awarded = 7× 3 = 21

No. of incorrect questions = 3

Marks deducted = 3 × (-1) = -3

Score made by Reshma = 21 - 3 = 18 = $\frac{18}{30}$ (Ans)

(iii) No. of correct questions = 3

Marks awarded = 3 × 3 = 9

No. of incorrect questions = 4

Marks deducted = 4 × (-1) = -4

No. of questions not attempted = 3

Marks awarded = 0 × 3 = 0

Score made by Rashmi = 9 - 4 + 0 = 5 = $\frac{5}{30}$ (Ans)