Due to 25% fall in the rate of eggs one can buy 2 dozen eggs more than before by investing Rs. 162. The the original rate per dozen of the eggs is = ?

Answer: Option C

25% fall we get 2 dozen eggs extra
∴ 25% = 2 dozen
100% = 8 dozen (new quantity)
So, old quantity = 8 - 2 = 6 dozen
$$\text{Rate}=\frac{162}{6}=\text{Rs}\text{. }27$$