Which of the following is not a random variable when flipping a

Question

Which of the following is not a random variable when flipping a coin?
a) Assigning 1 when Tail and 0 when Head
b) Assigning 0 when Head and 1 when Tail
c) The list of outcomes Head and Tail
d) The number of Heads
e) Assigning 1 when Tail or Head

Answer

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