Selam N. answered • 08/17/17

Tutor

5
(6)
Mathematics Teacher

Hi,

To solve this use permutation or counting principle. The beads are ordered in a different arrangement each time to arrive at a unique necklace.

You need to consider the Red and the Black

**as one bead**, since she decided that they stay next to each other.You also have to consider that

**the order of the Red and the Black**:- Red-Black
_{4}P_{4}= 24 - Black-Red
_{4}P_{4}= 24

There are 48 different necklaces: 24 + 24 = 48

I think this is helpful.

SN