// Shuffle array
const shuffled = array.sort(() => 0.5 - Math.random());
// Get sub-array of first n elements after shuffled
let selected = shuffled.slice(0, n);
let fruits = ["Apple", "Banana", "Mango", "Orange"]; // array
let index = Math.floor(Math.random() * fruits.length); // random index
console.log(fruits[index]); // result