Detailed Instructions: In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Problem:Problem: the average age of a , b and c is 29 years . if the average age of a and c is 32 years , what is the age of b in years ? 
Options: a ) 19 , b ) 35 , c ) 20 , d ) 32 , e ) 23
Solution:
e