Question 136

The ratio of ducks and frogs in a pond is 37 : 39 respectively. The average number of ducks and frogs in the pond is 152. What is the number of frogs in the pond?

Solution

Let the number of ducks and frogs in the pond be $$37x$$ and $$39x$$ resp

Acc to ques,

=> $$\frac{37x + 39x}{2} = 152$$

=> $$38x = 152$$

=> $$x = \frac{152}{38} = 4$$

$$\therefore$$ Number of frogs = 4 * 39 = 156

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