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☐ A
The discrete random variable X has the values 1, 2, 3, and 4. Let f be the probability mass function of X and
f(1) = f(2) = f(3) = 0.1. Calculate f(4).
A. 0.25
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B. 0.1
C. 0.7
D. 0.3
E. None of the other choices is correct
