Question 1009472
in an examination, a student attempted 15 question correctly and secured 40 marks. if there were two types of question (2 marks and 4 marks), how many questions of 2 marks did he attempt correctly? 
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Equation:
4*(15-x) + 2x = 40 points
60-4x + 2x = 40
-2x = -20
x = 10 (# of 2-mark questions attempted)
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Cheers,
Stan H.

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