question from the VCAA 2010 exam

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hi guys,

im confused with Q10 multiple choice on the 2010 exam.
Why is it a trisomy when there is still only 14 chromsomes (7 pairs)? wouldnt there have to be an odd number?

i really have no idea how to get a picture of it on here but here the link for quick access! its on page 6

http://www.vcaa.vic.edu.au/Documents/exams/biology/2010biology2-w.pdf

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sorry guys! i figured it out lol. there are 3 copies of the number 15 chromosome. i was looking in the wrong place! silly me my apologiess