in a class test ,5 marks are awarded for every correct answer and (-2) marks are awarded for every incorrect answer and 0 marks for question not attempted ...............anu gets 9 marks by attempting 20 question how many questions has she attempted correctly how many question has she attempted incorrectly?
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Answer:
3 answers is possible.
(3,3,14)
(5,8,7)
(7,13,0)
Step-by-step explanation:
As the solution is large I am attaching image as a reference.
I don't know you are in which grade, but to be honest, to solve this systematically, I think you should be atleast in highschool.
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