Answer:
1 bracelet.
Step-by-step explanation:
For one bracelet: 8 orange, 3 red, 4 green, 1 string.
The artist has: 15 orange, 86 red, 92 green, 17 string.
No matter how much of the red and green beads she has, if she only has 15 pieces of orange beads, that will only allow her to make 1 bracelet.