Thus, G:S = 8:9. Guppies account for 8 “parts” of the fish, and swordtails account for 9 “parts.” This means that, altogether, there must be 8 + 9 = 17 “parts” in the whole aquarium. Thus, in the whole aquarium, guppies are 8 parts out of 17 parts, or of the whole aquarium.
Answer = (B)
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