1 red bead for every 4 blue beads. The first ratio in the strand would go blue, red, red, red, red. That is five beads. 40/5 = 8. So for eight strands she would need 8 red beads, and 32 blue beads or vice versa, depending on which color comes first in the ratio.
Hope this helped, sorry if it was wrong.
The answer has something to do with volume.
1/2 a cup of every ingredient that is needed to make it.