February 26, 2017

Homework Help: maths

Posted by Jannie on Friday, October 15, 2010 at 12:38am.

In a test there were 25 multiple-choice questions. They were marked as follows:
2 marks for each correct answer
0 marks for a non-attempt
-1 mark for an incorrect answer.
Sarah attempted
5 of the questions and received 22 marks. How many questions did
she answer correctly?

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