Posted by **bballer** on Thursday, September 27, 2012 at 12:44am.

-Find the number of distinguishable permutations of the given letters ``AAABBBCCC''.

-If a permutation is chosen at random, what is the probability that it begins with at least 2 A's?

- math -
**dylan**, Thursday, October 25, 2012 at 4:13am
9!/(1!*3!*3!)

you take the total amount of letters you have factorial, divided by each of you different types of letters factorial. the reason that there is a 1! in the beginning is because you have the first two A's in the front, so they won't be going anywhere, leaving you with 1 A, therefore, 1!.

- math -
**q**, Monday, December 7, 2015 at 6:53pm
123145

## Answer This Question

## Related Questions

- math - If a permutation is chosen at random, what is the probability that it ...
- Math - Find the number of distinguishable permutations of the following letters...
- math permutations - how many distinguishable permutations are there of the ...
- probability & statistics - How many distinguishable permutations of letters are ...
- math - The number of distinguishable permutations that can be formed from the ...
- Maths - 1)A two-figure number is written down at random. Find the probability ...
- math - Find the number of distinguishable permutations of the word EDUCATED.
- math - How many distinguishable permutations of letters are possible in the word...
- Algebra 2 - how do you do permutations??? distinguishable ex. Sweetwater would ...
- Probability - Check - Could someone check these answers for me. Thanks 1. (3x+y...

More Related Questions