#!/usr/bin/ruby
# -*- coding: utf-8 -*-

=begin
점수 해시에서 평균 점수 계산
=end

people = [{ name: "Charlie", score: 13 },
          { name: "Steve", score: 34 },
          { name: "Anne", score: 23 }]

avg = people.sum { |_| _[:score] } / people.length.to_f

puts avg