3 dice game
Source: OLCOMA Costa Rica National Olympiad, Final Round, 2019 Shortlist LC2 day1 (logical reasoning)
September 22, 2021
probabilitycombinatorics
Problem Statement
A website offers for colones, the possibility of playing shifts a certain game of randomly, in each turn the user will have the same probability of winning the game and obtaining colones (per shift). But to calculate he asks you to roll dice and add the results, with what p will be the probability of obtaining this sum. Olcoman visits the website, and upon rolling the dice, he realizes that the probability of losing his
money is from .
a) Determine the probability that Olcoman wins a game and the possible outcomes with the dice, to get to this one.
b) Which sums (with the dice) give the maximum probability of having a profit of exactly colones? Calculate this probability and the value of for this case.