<p>in the anser explanation, it talks about trombones.</p>
<p>nowhere in the question were trombones mentioned or the number of possible instruments.</p>
<p>does anyone else find this question questionable??</p>
<p>oops - math section</p>
<p>No it is just saying that the other three students COULD have played trombone to emphasize their point. They could have picked any instrument but they picked a trombone. lol</p>