Question

in a competition 5 marks are given for every correct answer and - 2 marks are given for every incorrect answer Anjali score 30 marks if she got 10 correct answer how questions answer in correctly

Answer 1

She answered 20 questions in which 10 were right and 10 were wrong

Answer 2

let number of wrong answers be x
30=5×10-2×x
30=50-2x
-20=-2x
10=x
She answered 10 questions correctly