What is the average (arithmetic mean) of the numbers 16, 17, 17, 18, 19, 19 and 20?	Choose the correct option
A) 18 B) 17 C) 16 D) 15 E) 19
{16, 17, 17, 18, 19, 19, 20}={18-2,18-1,18-1, 18, 18+1, 18+1,18+2} --&gt; the average = 18.   18nswer: 18.
<result>A</result>
What is the average (arithmetic mean) of the numbers 16, 17, 17, 18, 19, 19 and 20?