:2. A box contains 10,000 tickets.  The box average is 100, and
the box SD is 20.  A simple random sample of 100 tickets is drawn
from the box.  The chance that the average of the tickets in the
sample is between 98 and 102 is closest to

 a.  100%
 b.   68%
 c.    0%
 d.   95%
 e.  99.7%