Tuesday
March 31, 2015

Homework Help: Statistics

Posted by Meg on Tuesday, July 2, 2013 at 4:31pm.

Two dice are tossed. What is the probability that the sum of both dice is a prime number?
This is what I have so far
Presuming two fair, 6-sided dice, each numbered 1 through 6:

You can achieve one of the following results on any given roll: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. But there is only 1 way to get a 2, 2 ways to get a 3, 3 ways to get a 4, up to 6 ways to get a 7, then 5 ways to get 8, and so on. Total is 1 + 2 + 3 + 4 + 5 + 6 + 5 + 4 + 3 + 2 + 1 = 36 possible outcomes.

The prime numbers from 2 through 12 inclusive are: 2, 3, 5, 7, and 11. There is 1 way to get a 2, 2 ways for a 3, 4 ways for a 5, 6 ways for a 7 and 2 ways for 11. Total of 1 + 2 + 4 + 6 + 2 = 15 successful outcomes out of 36 possible outcomes.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Stats - Two dice are tossed. What is the probability that the sum of both dice ...
probability - Two six-sided dice each have the numbers 1 through 6 on their ...
Probability NEED HELP - 1. When two fair dice are tossed, what is the ...
Probability - You roll two five-sided dice. The sides of each die are numbered ...
Probability - 1. When two fair dice are tossed, what is the probability of a sum...
statistics - 2. Two fair dice are rolled at the same time and the number of dots...
statistics - Two dice are rolled and two fair coins are tossed. Let X be the sum...
statistics - Two dice are rolled and two fair coins are tossed. Let X be the sum...
algebra - two dice are rolled. if a 3 appears on either dice,then the two dice ...
math - two dice are rolled find the probability of getting a 5 on either dice or...

Members