Your making a necklace with 4 red peices and 4 yellow peices. How many different combination of necklaces can you make?

is 2^8 correct.

Printable View

- Oct 29th 2008, 04:41 PMharold3331combinations
Your making a necklace with 4 red peices and 4 yellow peices. How many different combination of necklaces can you make?

is 2^8 correct. - Oct 30th 2008, 01:53 PMBoboStrategyRe: necklace
2^8 is not correct.

Here's why:

2^8 assumes a necklace like:

RYRYRYRY

is different than a necklace like:

YRYRYRYR

You need to reflect this in your counting to obtain the correct (i.e. lower) answer. - Oct 30th 2008, 04:50 PMSoroban
Hello, harold3331!

This is a**very**tricky problem . . .

Quote:

You're making a necklace with 4 red pieces and 4 yellow pieces.

How many different combination of necklaces can you make?

is 2^8 correct? . . . . no

Your answer assumes there are at least eight of each color

. . and includes all the combinations from

Even worse, this is a necklace . . . a__circular__arrangement.

So that, for example: .

. . That is: . . .

There is one more "trap" in a Necklace Problem, overlooked by the best of us.

This is similar to seating 4 men and 4 women around a circilar table,

. . except a necklace can be "flipped over".

So that: . . .

Care to try again?