What is the probability that you will not roll doubles when rolling two fair fifty sided dice (the sides are numbered 1-50 on each die)?

Sample space of two fair fifty sided dice = 50^2 = 2500
Probability of rolling a double = 50/2500 = 1/50
Probability of not rolling a double = 1 - 1/50 = 49/50
 

6(2x + 5y)6 (2x) = 12x6 (5y) = 30y12x + 30y