math
posted by mckayela .
PLEASE HELP!!!(: There are 9 red gum balls, 5 green gum balls, 8 yellow gum balls, and 8 blue gum balls in a machine. Find P(green, then yellow). (1 point)
A. 400 over 900
B. 5 over 30
C. 8 over 30
D. 40 over 870
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