Question

There are 11 boxes, one of the boxes contained a bomb
and the others each contains Ai coins for i=1...10

what's the expected value of coins you get from picking m boxes
among these 11 boxes.

(if you pick the bomb you get nothing)

Answer #1

**A _{i} is the number of coins contained in the
i^{th} box, i = 1,2,..,10. Let A_{11} =
0(representing the number of coins in the box containing the bomb).
m boxes are selected out of the 11 boxes. Define the random
variable, a_{j} = the number of coins in the j^{th}
selected box, j = 1,2,...,m. We have to find the expected number of
coins by selecting m boxes out of 11, i.e.**

**Therefore,
. (Answer)**

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