7. In a class test containing 10 questions, 5 marks are awarded for every correct answer and (–2) marks are awarded for every incorrect answer and 0 for questions not attempted.

 (ii) Reshma gets five correct answers and five incorrect answers, what is her score?

Answers (2)

Given,

Total questions = 10

Marks for correct answer = +5

Marks for incorrect answers = -2

Marks for unattempted question = 0

According to question,

Reshma gets five correct answers and five incorrect answers

Total marks = 5(+5)+5(-2) = 25 -10 = 15

Therefore, Reshma scored 15 marks.

(a) David attempts 8  correct  answers 

So marks of 8 correct answers = 8×5= 40 marks

He att.......ts 16 in.......ct answers 

So............................................ =16×(-2) = (-32) 

So; 40-32=8 marks

(b) Rabina att........ 16 correct answers

So.................... 16 c......... = 16×5= 80marks

He att.........ts 8 in.........ct answers

So............................................ = 8×(-2) =(-16) 

So;80-16= 64 marks

(c) Hamid att.......... 4 correct answers

So................... 4 c....... =4×5=20 marks

He att............. 12 in............ct answers

So........................................... =12×(-2) =(-24) 

So;20-24= (-4) marks

Then;(a) = 8 :(b) =64 : (c) =(-4) 

 

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