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The ratio of frogs and crocodiles in a pond is 25 : 33 respectively. The average number of frogs and crocodiles in the pond is 261. How many frogs are there in the pond?

The ratio of frogs and crocodiles in a pond is 25 : 33 respectively. The average number of frogs and crocodiles in the pond is 261. How many frogs are there in the pond? Correct Answer 225

Ratio of frogs and crocodile in a pond = 25 ∶ 33

Let, number of frogs = 25x and no. of crocodiles = 33x

According to problem,

⇒ (25x + 33x)/2 = 261

⇒ 58x = 261 × 2

⇒ x = 522/58 = 9

∴ The number of frogs in the pond = 25x = 25 × 9 = 225

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