Posted by **Tami** on Saturday, August 14, 2010 at 3:00am.

How many three-symbol codes (letter-number-number) can be made from the letters S, P, Y and two digits from the set {0, 1, 2, …,9} without repetition?

I think I am suppose to match each letter with a number until I exhaust all possibilities but I am not sure can you help please?

- math157 -
**jai**, Saturday, August 14, 2010 at 6:14am
for the letter: determine first how many letters are possible,,

there are 3 *S, P, Y

for the first number: how many are possible,,

there are 10 *0,1,2,..9

for the second number: since no repetition is allowed, there only 9 possible,,,

then multiply:

3*10*9 = 270 possibilities

so there,, =)

- math157 -
**Tami**, Sunday, August 15, 2010 at 12:35am
Wonderful, Thanks for your hel:)

## Answer This Question

## Related Questions

- Math - Did I do this problem right? How many three symbol codes (letter-number-...
- Mat 157 - How many three-symbol codes (letter-letter-number) can be made from ...
- math 157 - How many three-symbol codes (letter, letter, number) can be made from...
- MATH 157 - Can anyone please help me understand these math problems. #4. How ...
- Math - A license plate is to consist of two letters followed by three digits. ...
- Math - A license plate is to consist of two letters followed by three digits. ...
- Math - 1.) A security code has seven characters. Each code begins with two ...
- Probability(math) - How many computer passwords can be created with three digits...
- algebra - Beginning with cars made in 1981, all vehicles must contain a 17-digit...
- Maths - 1)A two-figure number is written down at random. Find the probability ...

More Related Questions