Question

3. In a test (+5) marks are awarded for every correct answer, (-2) for every incorrect answer and 0 for not attempting the question.
(i) Renu scored only 40 marks inspite of getting 10 correct answers. How
many questions has she attempted incorrectly?
(ii) Rohit scored ( -3) marks in this test though he has got 3 correct
answers. How many questions has he attempted incorrectly

Answer 1

Answer:

i)She answered 5 questions incorrectly

ii)He answered 9 questions incorrectly

Answer 2

i)Marks for correct answer= +5 Marks for incorrect answers= -2 Total marks= 30 Number of correct answers= 10 Marks she got for correct answers= 10*5= 50 Let x be number of incorrect answers Radhika got, 30=50+-2*x

30-50= -2*x -20=-2x -20/-2 = x 10= x

Radhika got 10 answers as incorrect.

ii) Total marks Jay scored= -12 Number of correct answers= 4 Marks he scored for correct answers= 4*5= 20Let the number of incorrect answers be X, -12= 20-2*x -12-20= -2x -32= -2x -32/-2 = x 16 = x

Jay attempted 16 answers as incorrect.

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