<p>N is a set of numbers whose average (arithmetic mean) is 3. M is a set that is generated by doubling each number each number in N. What is the average of the numbers in set M?</p>
<p>a.1/3
b.2
c.3
d.6
e.9</p>
<p>I need expalination with details.
Thank you very much! :)</p>
<p>This is not difficult. Why not make a set of numbers, find the average, double each number, and find the new average? Then you may see a rule to follow…</p>
<p>Intuitively, the answer should be 6, and not depend on the size of N.</p>
<p>For example you could let N = {3,3,3,3,3}, then M = {6,6,6,6,6}.</p>
<p>Thank you So much!! :)</p>
<p>nice question</p>
<p>i need more of these</p>