there are 3 ways for the Registration of cars.

1: ABC-123 or XYZ-123

2: AB-1234 or YZ-1234

3: A=13245 or Z-12345

by which method maximun number of cars can be registred???

Note: there should be no entry like this .

ABC-000 or AB-0000 or A-00000

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- March 8th 2007, 08:59 PMbilalroufRegistration of cars
there are 3 ways for the Registration of cars.

1: ABC-123 or XYZ-123

2: AB-1234 or YZ-1234

3: A=13245 or Z-12345

by which method maximun number of cars can be registred???

Note: there should be no entry like this .

ABC-000 or AB-0000 or A-00000 - March 8th 2007, 09:17 PMbilalrouf..
i think we can solve it by finding permutation of each part separately.like this

ABC-123

possible number of Registration ={ permutation of ABC }* {permutation of 123)

= (**26 P 3) * (10 P 3)**

**= 15600 * 720**

**= 11232000**

**AB-1234**

possible number of registration = (**26 P 2) * (10 P 4)**

**= 650 * 151200**

**= 98280000**

**A-12345**

possible number of registration = (**26 P 1) * 10 P 5**

**= 26 * 30240**

**= 786240**

**answer is AB-1234**

**is it correct to solve this problem in this way??** - March 9th 2007, 05:24 AMPlato
This problem is in need of clarification.

It is not clear if you are allowing repetition?

Can we have a tag such as ADD1322.

You seem to allow repetition in that you say we cannot have AXY0000.

Or is that letters cannot be repeated but digits can?

All of your answers assume**no repetitions**. - March 9th 2007, 08:18 PMbilalrouf..
if Repetation is allowed only in alphabet then what will be the answer

- March 9th 2007, 11:15 PMCaptainBlack
- March 9th 2007, 11:18 PMCaptainBlack