I do not add probabilities to anybody!
Empirical probabilities.
If the first roll is a three, it's impossible to get an eleven (the highest you can get is a 9), so the probability is 0. The way to get a sum of 7 is to add 3 and 4. The probability of getting a 4 on the second die is 1/6. Therefore, by adding the two probabilities of the outcomes (0 and 1/6), you get the answer: 1/6.
Things and numbers don't have probabilities. Situations and events that can happen have probabilities.
This is a Binomial Probability Distribution, with number of trials n=7, r = 4, 5, 6, & 7 (at least 4 is 4 or more), and probability p is 1/2 or 0.5. The related link gives the binomial probabilities and the values, which are added together. The values for r = 4, 5, 6, & 7 are 0.273, 0.164, .055, .008. These add to 0.5, so the probability of getting at least 4 heads with a coin tossed 7 times is 0.5 or 50%.
The experiment is undefined. On a single roll of eight or more normal dice the probability of getting a sum of 7 is 0.
why did you rape one?
I do not add probabilities to anybody!
Empirical probabilities.
The one digit prime numbers are 2, 3, 5 and 7. The probabilities of getting these numbers are as follows:P(X=2) = 1/36P(X=3) = 2/36P(X=5) = 4/36P(X=7) = 6/36Adding these probabilities up, the probability that Randy will roll one of these numbers is 13/36.
Sum of all probabilities is 1.
Statistical Probabilities was created on 1997-11-22.
If the first roll is a three, it's impossible to get an eleven (the highest you can get is a 9), so the probability is 0. The way to get a sum of 7 is to add 3 and 4. The probability of getting a 4 on the second die is 1/6. Therefore, by adding the two probabilities of the outcomes (0 and 1/6), you get the answer: 1/6.
The sum of the probabilities of all possible outcomes is 1.
False
Things and numbers don't have probabilities. Situations and events that can happen have probabilities.
This is a Binomial Probability Distribution, with number of trials n=7, r = 4, 5, 6, & 7 (at least 4 is 4 or more), and probability p is 1/2 or 0.5. The related link gives the binomial probabilities and the values, which are added together. The values for r = 4, 5, 6, & 7 are 0.273, 0.164, .055, .008. These add to 0.5, so the probability of getting at least 4 heads with a coin tossed 7 times is 0.5 or 50%.