Answer:
option (a) 2.5
Step-by-step explanation:
Given:
Price cuts of dolls = 10 percent
Quantity of the dolls sold increases = 25 percent
Now,
Price elasticity of demand for dolls =

on substituting the respective values, we get
Price elasticity of demand for dolls =

or
Price elasticity of demand for dolls = 2.5
Hence, the correct answer is option (a) 2.5