You can
put this solution on YOUR website!Lowest: k = 0
Highest: k = 7
(1/0!) + (1/1!) + (1/2!) + (1/3!) + (1/4!) + (1/5!) + (1/6!) + (1/7!)
1 + 1 + 1/2 + 1/6 + 1/24 + 1/120 + 1/720 + 1/5040
2 + 2520/5040 + 840/5040 + 210/5040 + 42/5040 + 7/5040 + 1/5040
2 3620/5040 = 2 181/252