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/*
  [programmers / 배열의 평균값]

  입출력 예
  numbers	                               result
  [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]	        5.5
  [89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]	94.0
*/

function solution(numbers) {
  let sum = 0;
  let answer;

  for (let i = 0; i < numbers.length; i++) {
    sum += numbers[i];
  }

  answer = (sum / numbers.length).toFixed(1);

  return answer;
}