Wednesday

January 28, 2015

January 28, 2015

Posted by **Nancy** on Tuesday, September 14, 2010 at 4:29pm.

In a Multiple - choice examination of 25 questions, four marks are

given for each correct answer and two marks are deducted for each

wrong answer. One mark is deducted for any question which is not

attempted.

A candidate attempts q questions and gets c correct.

a) Write down an expression for the candidate's total mark in terms of

q and c.

b) James attempts 22 questions and scores 55 marks. Write down and

solve an equation for the number of questions which James gets right

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