Question

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3. In a test, +3 marks are given for every correct answer and -l mark is given
for every incorrect answer. Sona attempted all the questions and scored
+20 marks though she got 10. correct answers.
i. How many incorrect answers has she attempted?
ii. How many questions were given in the test?​

Answer 1

1. 10
2. 20.
3. explanation.
4. correct answer 10=30 marks
5. marks= 20
6. then incorrect marks =10
7. correct questions +incorrect questions =20 questions