• In a test +3 marks are given for correct answer and -1 mark are given for every incorrect answers. Sona attempted all the quest

2 thoughts on “• In a test +3 marks are given for correct answer and -1 mark are given for every incorrect answers. Sona attempted all the quest”

1. Answer:

   a. 10

   b. 30

   this is the correct answer

   Step-by-step explanation:

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2. Answer:

   • In a test +3 marks are given for correct answer
   • –1 mark are given for every incorrect answers.
   • Sona attempted all the questions and scored +20

   ⇒she get 10 correct =10×3=30

   ⇒20=30(–1)x

   ⇒20–30=–1x

   ⇒–10=–1x

   x=10

   incorrect answers has she attempted =10

   total questions in test =20+10=30questions.

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