Seventy percent of married couples paid for their honeymoon themselves.  You randomly select 20 married couples and ask each if they paid for their honeymoon themselves.  To three significant digits, find the probability that the number of couples who say they paid for their honeymoon themselves is:

1. exacltly one.
   {#1}
   
   
2. more than one.
   {#2}
   
   
3. at most one.
   {#3}