. A farm is chennai has round 200 trees each separate by about 20m., These trees are home to many brids. There are 13 birds that weigh up to 15g, 47 that weigh from 15 to 50g, and 37 that weigh greater than 50g. In the month of June, around 2 hours after sunset, after all birds have returned to their nests, a cunning fox finds its way into the farm. The fox takes a bird out of its nest at random. How many sparrows must the fox tke out to make sure that it has two of each weight range?

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