Can someone plz break this problem down for me & explain it to me in a very basic way. I am very bad at permutations & combination. Thank you! A jeweler has exactly six distinct beads: 3 agate beads and 3 quartz beads. All the beads are different color. If the jeweler wants to alternate the beads so that no 2 agate or quartz beads are adjacent, in how many different ways could the jeweler string the beads on a single thread?