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May 25, 2015

Homework Help: Maths

Posted by Jannie on Wednesday, November 17, 2010 at 12:32am.

Multiple-choice questions in a test are graded by adding 2 marks for each correct
response and subtracting 1 mark for each incorrect response (including no response).
Rory and Jenny answered all the multiple-choice questions, with Rory scoring 27 and
Jenny scoring 42. Rory answered 19 questions correctly.
a How many multiple-choice questions were there?
b How many more questions than Rory did Jenny answer correctly?

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