How many necklaces can be made?
Algebra
Level
5
How many necklaces can be made using 7 beads of which 5 are identical red beads and 2 are identical blue beads ?
The answer is 3.
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1 solution
The blue beads can be next to each other, have 1 red bead between them, or have 2 red beads between them. 3 possibilities.