SOLUTION: a license plate has seven possible places how many license plates can be made if only two numbers are used example 1222121 and every slot must be filled to equal a seven digit numb
Algebra.Com
Question 514818: a license plate has seven possible places how many license plates can be made if only two numbers are used example 1222121 and every slot must be filled to equal a seven digit number
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I'll take a shot at this
If I settle on 2 distinct numbers, like 4 and 7
I have 2 choices for each of the 7 positions on the plate
That's possible license numbers
-------------
Now how many pairs of numbers 0 through 9 are available?
0 can be combined with 1-9, and that's 9 numbers
1 can be combined with 2-9, and that's 8 numbers
... etc...
8 can be combined with 9 and that's 1 number
So I have
possible pairs
Each of these possible pairs can make different
plates, so
different plates can be made
This is if is allowed
If it isn't, the answer is
Hope I got it
RELATED QUESTIONS
A license plate has 4 letters, followed by 2 numbers. If repetition is not allowed, how... (answered by Theo,ikleyn)
how many different license plates could be made if the first two places on the license... (answered by Fombitz)
a license plate consists of 1 letter followed by 5 digits how many different license... (answered by swincher4391)
If in a series of license plate the letters i and o are not used and if four successive... (answered by josmiceli)
How many different automobile license plates can be made if each plate has a letter... (answered by stanbon)
suppose a license plate consists of five different letters.
a) How many five-letter... (answered by edjones)
A license plate is to consist of two letters followed by 3 digits. How many different... (answered by fcabanski)
if an automobile license plate contains 3 numbers followed by 3 letters, how many... (answered by rfer)
If a car license plate is configured at 3 letters and 4 digits, how many different... (answered by ikleyn)