題組內容

Problem 21. 61ba871b5fa97.jpg ... be independent random variables all distributed according to the pdf fx(x) = 1 for 0 ≤ x ≤ 1. Define 61ba874252b18.jpg= X1 X2X3... 61ba876e9c462.jpgfor some integer n. Then var(61ba878105425.jpg)is equal to

(iii) 61ba87f54fcf9.jpg