A. 1/6, 6 possible outcomes with 1 desired result.
B.67/450 will give you the answer of 14.888...% I'm going to assume your teacher will let you round to 15 so the chances are 15/100 and in simplest form is 3/20.
The correct answer is 184.9
Add 10 then subtract 5 gives: 11, 21, 16, 26, 21
add 10 and subtract 5 gives: 11, 16, 21, 26, 31
Kidjov the answer I came up with for you is 792 I hope this helps