Question

In a class test containing 10 questions, 3 marks are given every correct answer and minus 4 marks are given for every correct answer the question but only 5 of an answer are correct what is her total score

Answer 1

sol:-
no.of answers correct=5
no.of answers wrong=5
marks given to correct answer=3
marks given to wrong answer=(-4)
So,
her marks for correct ans.=5*3=15
marks for wrong ans.=(5*(-4))=(-20)
subtract (-20)from 15=-5
so answer is -5