Question

Quan In the class test +3 marks are given for every correct
answer and -1 mook ase given for every incorrect
answer. sono attempted all the question and scored, +20
marks though she got lo correct answers.
How many incorrect answer has she attempted ?​

Answer 1

Answer:

10

Step-by-step explanation:

Sono attempted all questions and scored +20, she has answered 10 correctly.

So her marks should be 10*3= 30, but she has got 20, so 10 marks have been deducted.

We know -1 mark for every wrong answer, so no of wrong answers= 10/1= 10

Total no of questions are 10 and attempted incorrectly = 10