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tresset_1 [31]
3 years ago
5

A large aquarium contains only two kinds of fish, guppies and swordtails. If 3/4​​ of the number of guppies is equal to 2/3​​ of

the number of swordtails, then what fraction of fish in this aquarium are guppies?
Mathematics
1 answer:
Jlenok [28]3 years ago
6 0

Answer:

\frac{8}{17} of fish in this aquarium are guppies.

Step-by-step explanation:

Let x be the number of guppies and y be the number of swordtails in the aquarium,

According to the question,

\frac{3}{4}\text{ of } x=\frac{2}{3}\text{ of }y

\frac{3x}{4}=\frac{2y}{3}

By cross multiplication,

9x=8y

\implies \frac{x}{y}=\frac{8}{9}

Thus, the ratio of guppies and swordtail fishes is 8 : 9

Let guppies = 8x, swordtail = 9x

Where, x is any number,

Since, the aquarium contains only two kinds of fish, guppies and swordtails,

So, the total fishes = 8x + 9x = 17x

Hence, the fraction of fish in the aquarium are guppies = \frac{\text{Guppies}}{\text{Total fishes}}

=\frac{8x}{17x}

=\frac{8}{17}

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