Independent random variables

  • Thread starter shoplifter
  • Start date
  • #1
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Let x_1, x_2, ..., x_n be identically distributed independent random variables, taking values in (1, 2). If y = x_1/(x_1 + ... + x_n), then what is the expectation of y?
 

Answers and Replies

  • #2
530
7
Hint: use E[(x_1+...+x_n)/(x_1+...+x_n)]=1.
 

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