in a class is + 3 marks are given for every correct answer and - 2 marks are given for every incorrect answer and no marks for attempting any questions

a) if Sona scores and 10 marks and she has got 5 incorrect find out how many correctly she got?


b) if Rahul scores - 2 marks if he has got 6 in correct then find out how he got correct


please answer this fast it is urgent