A farmer has some hens and some goats If the total number of animal heads is 80 and the total number...........

Quantitative Aptitiude (CLAT) Ratio, Proportion

A farmer has some hens and some goats. If the total number of animal heads is 80 and the total number of animal feet is 200. What is the total number of goats?

can't be determined

Explanation:

Total animals/heads = 80
Total legs = 80
(goat has 4 legs and hen has 2 legs)
Let's assume all animals are goats,
Then, total legs = 80 x 4 = 320
Extra legs = 320 - 200 = 120
Now, No. of hens = Extra legs /legs of hen = 120/2 = 60 hens.
No. of Goats = 80 - 60 = 20
Hence, option 3 is the correct answer.