Question

• In a test +3 marks are given for correct answer and -1 mark are given for every incorrect answers. Sona attempted all the questions and scored +20 marks through she got 10 correct answers.

(a) How many incorrect answers has she attempted ?
(b) How many questions were given in the test ?

Give the correct answer....do not write wrong answer and unnecessary answer..OKAY !!

QUESTION FROM CLASS :- 7th BOOK....

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Answer 1

Answer:

a. 10

b. 30

this is the correct answer

Step-by-step explanation:

mark me as brainlist

Answer 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.