Question

a test has 200 question . each correct .each correct answer consist of 2 marks and wrong answer of -1/2 marks. if the student score 360 marks
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Answer 1

Step-by-step explanation:

let the wrong attempt was x.

right attempt=200-x

final marks=2*(200-x) -x*1/2

360=400-2x-x/2

360-400=-4x-x/2

-40=-5x/2

-80=-5x

x=16

wrong attempt=16

right attempt=184

Answer 2

Answer:

Let the correct question attempted be x and wrong question attempted be (200 - x)

• According to the Question :

⇒ 2x - .5(200 - x) = 360

⇒ 2x - 100 + .5x = 360

⇒ 2.5x = 460

⇒ 5/2x = 460

⇒ x = 92 × 2

⇒ x = 184

• Question Attempted :

⇢ Right = x = 184

⇢ Wrong = (200 - x) = 16