Posted by **Kesha** on Monday, February 22, 2010 at 2:36am.

When a die is rolled three times,

1. what is the probability of three no.s being all different?

2. And is the opposite of that event two or three no's being the same?

- Maths -
**PsyDAG**, Monday, February 22, 2010 at 6:46am
1. You are concerned with *not* matching the first toss, no matter what it is and not matching the second toss either (5/6*4/6).

2. Again the first toss can be any number. For two the same, you need one the same and one different (1/6*5/6). From that, you should be able to determine the probability of 3 the same. (Either-or probabilities are determined by adding the separate probabilities.)

I hope this helps.

## Answer this Question

## Related Questions

- Maths - - In a normal pack of cards, write down the odds against picking each ...
- maths - A fair die is rolled three times. Find the chance that three different ...
- Math - Can someone please help me! A regular 6sided die is rolled three times. ...
- math - A standard die is rolled three times. What is the probability that a ...
- Math - Two dice are rolled. Find the probability that a multiple of three is ...
- MATH - A box contains four white, three red, and two black marbles. Three ...
- MATH - NOT INDEPENDENT A box contains four white, three red, and two black ...
- Algebra 2/statistics - On a fair 6-sided die, each number has an equal ...
- probability and statistics I NEED HELP - A six-sided die is rolled 20 times and ...
- statistics - 6. You read in a book about bridge that the probability that each ...

More Related Questions