Answer:
3 packages will be required.
Step-by-step explanation:
Juanita puts 15 beads in a necklace.
Let Juanita purchases number of packages = 1
Then number of necklaces prepared = 
= 
From 1 package number of necklaces prepared will be 1 and number of beads left = 5
If she purchased 2 package then number of necklaces prepared = 
From 2 packages 2 necklaces will be prepared and 10 beads will be left.
Now, if she purchases 3 packages of beads then number of necklaces prepared = 
Therefore, 3 packages of beads will be required with no beads as left over.