Wednesday

January 28, 2015

January 28, 2015

Posted by **yorkie16** on Saturday, April 25, 2009 at 2:42pm.

- math -
**Count Iblis**, Saturday, April 25, 2009 at 4:02pmIf you take 7 minus the result of a dice throw, then that's another valid dice throw. So, for two dice throws, the probability that the sum is greater than 8, is the same as the probability of 14 minus the sum being larger than 8, which is the same as the probability of the sum being less than 6.

If we then add the probability for the sum being larger than 8 and smaller than 6, we get twice the probability. If you subtract that from 1, you get the result:

1-2 p = probablity that the sum is 6 7 or 8

where p is the desired probability.

Now the probability of the sum being 6, P(6)is the same as the sum being 8,

P(8), because 14-8 = 6, so we have:

1-2p = 2 P(6) + P(7) ------->

p = 1/2 - P(6) - 1/2 P(7)

**Answer this Question**

**Related Questions**

math - Two dice are rolled. Find the probability of getting a sum greater than 8...

math - two dice are rolled find the probability of getting a 5 on either dice or...

Math - Two dice are rolled. Find the probability of getting a 5 on either die ...

math - Two dice are rolled. Find the probability of getting a 5 on either die or...

math - If two dice are rolled, what is the probability that their sum will be a ...

algebra - two dice are rolled. if a 3 appears on either dice,then the two dice ...

Math - when two fair dice are rolled find the probability that the sum is even ...

Probability - When two fair six-sided dice are rolled, there are 36 possible ...

math - If two dice are rolled one time, find the probability of getting a sum ...

Probability - Two fair dice are rolled together. The probability that the sum ...