Kata

You are going to be given a list of people. Their properties are name (string), gender (male/female), and age (int). Your job is to return the average age of all females in the list.

#Examples:

sortArray([{name:'Sarah', gender:'female', age:25}, {name:'Tom', gender:'male', age:18}, {name:'Tim', gender:'male', age:65}, {name:'Kim', gender:'female', age:58}]) 
should return 41.5

#Input

An array of objects.

#Output

A number, the average age of all females.