You add up all of the Frequencies together (to get 50)
The number 6 was rolled 9 times. So that makes it 9/50.
9/50 -> .18 or 18%
Does that help?
25 pens is better because if you see the cost of one it will be cheaper
This is Pythagorean theorem, a^2+b^2=c^2 , a = 33 and c = 37 so b^2 + 1089 = 1369 , b^2 = 280 , b = 16.73m
