Answer: Both has equal probability of winning.
Explanation:
It is given that Bob and Ben, each buy one lottery ticket.
Each ticket contains six numbers from a total of one hundred numbers (0–99).
Since, both the friends have bought same number of ticket with 6 numbers on each ticket.
Probability for choosing any numbers from (0-99) is same for all numbers from 0 to 99 i.e.
.
Therefore, The probability of winning would be equal for both the friends.