Answer: 60
Explanation:
144 beads divided by 3 would equal how many black beads there are, which is 48. 144 beads divided by 4 would be how many purple beads there are. which is 36. You would add the black beads and the purple beads, or 36 + 48, to get the total of both. 36 + 48 = 84. You would take the 144 beads total minus the 84 black and purple beads, which is 60.