Question

In a test +3 marks are given for every correct ans and -1 marks are given for every incorrect

ans and no marks are provided for not attempting the question. Find

a) What is total marks obtained by a student if she got 10 answers correct and two

incorrect.

b) If one student scored +20 marks and she got 10 answers correct after attempting all the

questions, then how many answers did she get wrong?​

Answer 1

Answer:

a) answer is 28 marks

b) answer is that she got 10 questions wrong

Answer 2

Answer:

a) 10*3 - 2

30 - 2

28

She obtained 28 marks

b) 20 = 10*3 - x

20 - 30 = -x

-10 = -x

x = 10

She got 10 answers wrong