If one works with dice, one should learn to use a generating polynomials. SEE HERE.We throw three healthy dice together. If the random variable X is equal to the sum of the numbers on the 3 observation dice. Get the probability function X and find the probability that the sum of the numbers on the dice is at least 15.
I guess that "healthy dice" here means "fair dice", or perhaps "ordinary (6-sided) dice".We throw three healthy dice together. If the random variable X is equal to the sum of the numbers on the 3 observation dice. Get the probability function X and find the probability that the sum of the numbers on the dice is at least 15.