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Bunuel
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A fresh water aquarium contains Molly fish and Guppy fish at a ratio 26 Jun 2023, 01:30
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25% (medium)

Question Stats:

81% (02:07) correct 19% (02:45) wrong based on 58 sessions

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A fresh water aquarium contains Molly fish and Guppy fish at a ratio of 15:16. If 35 additional Guppy fish were put in the aquarium, the ratio of Molly fish to Guppy fish would be 15:21. How many Molly fish does the aquarium contain?

A. 90
B. 105
C. 120
D. 135
E. 150



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B
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A fresh water aquarium contains Molly fish and Guppy fish at a ratio 26 Jun 2023, 02:18
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Molly fish and Guppy fish at a ratio of 15:16, Let`s open the ratio then Molly fish is 15x and Guppy fish is 16x

It is given 35 additional Guppy fish were put in the aquarium then Total Guppy fish = 16x + 35

After that the ratio of Molly fish to Guppy fish would be 15:21, Let`s make an equation :
15x / 16x + 35 = 15/21
After solving this equation x = 7 and Question ask Molly fish does the aquarium contain ,So 15*7 = 105

Answer is option B.
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