Question

There are 20 questions in a mathematics competition. 5 marks are awarded for each correct answer, while 1 mark and 3 marks are deducted for each blank answer and wrong answer respectively. If Roger has given 10 correct answers and 6 wrong answers,

(a). How many questions does he leave blank?
(b). How many marks can he get?

Answer 1

for a its 20-6-10=4

for b) he has 10 correct answers so he gets 50 points but as he has 6 wrong answers, he gets deducted 18 points (6*3) and he also gets deducted by 4 marks as he left 4 questions blank(4*1) so 50-18-4=28