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Discussion Starter #1 (Edited)
For a class a friend is taking. License plates.

2 number and 4 letters.

3 numbers and 3 letters.

How to figure out how many combinations are possible.



Thanks,
ElDeeDer
 

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r00t4r3d
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2 Number and 4 Letter combo:
10 x 10 x 26 x 26 x 26 x 26*

3 Num 3 Letter:
10 x 10 x 10 x 26 x 26 x 26*

*If letters and numbers can be used more than once.

imho.... Go with BigCountry in 4/4=4
 

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Is this friend learning how to press license plates in the pen?
 

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Calculating combinations and permutations
combinations (nCk)
Click in an unoccupied cell, for example C4. Then type =combin(your n-value, your k-value), i.e. "10 choose 6" would be =combin(10,6). The number of combinations will appear in the C4 box. It should be 210.
permutations (nPk)
Click in an unoccupied cell, for example C5. Then type =permut(your n-value, your k-value), i.e. 9 P 5 would be =permut(9,5). The number of permutations will appear in the C5 box. It should be 15120.


excel for the win.
 

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hug life
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the answer is = ammount of posts you have - the IQ of bigcountry + the number of cars broken into by AjHall / how many times he got caught * the number of permits he had
 

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In general, the number of ways to choose k items from n is:

n!/(k!(n-k)!)

thus, 2 of 10 + 4 of 27 = answer 1
3 of 10 + 3 of 27 = answer 2
 

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Discussion Starter #13
Lothos,

When I put =combin(10,26) in the box i get #num!

10 being 0-9
26 being 26 letters in the alphabet.

Am i not following something or am i missing something.

Thanks for the help.
 

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oh yeah, forgot the the first number is the set and the second is the number of items from the set.
 

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Insomniac
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You forgot to factor in the plates/combinations that the state won't allow (like ASS as the three letters, etc).
 
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