In a mathematics competition each correct answer gains 5 marks. However, 1 mark is
deducted for each incorrect answer. Mary answered 30 questions for a total of 78 marks.
Determine the number of correct and incorrect questions Mary answered?
Answers
Answered by
1
Answer:
here's your answer with the complete explaination hope this helps
Attachments:
Answered by
1
Answer:
18 right answer and 12 wrong answer
Similar questions