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 ?

Answer: Option C

Ratio of Ducks and Frogs in Pond = 37 : 39
Average of Ducks and Frogs in Pond = 152
So, total number of Ducks and Frogs in the Pond = 2 × 152 = 304
∴ Number of Frogs = $$\frac{304\times 39}{76}$$  = 156