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Question: 2016 Fall Final - 22

Author: Michiel Smid
You flip a fair coin 7 times; these coin flips are independent of each other. Define the random variables
  • X = the number of heads in these 7 coin flips,
and
  • Y = the number of tails in these 7 coin flips.
Which of the following is true?
(a)
The random variables $X$ and $Y$ are independent.
(b)
The random variables $X$ and $Y$ are not independent.
(c)
None of the above.