Question 1193590
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The answer in the post by the other tutor is incorrect and is written in absurdist form.


In this problem, the random variable X has the values 0, 1, 2, 3.


The right form for the cumulative distribution function in this problem is


<pre>
    F(x) = 1/8  for x = 0;

    F(x) = 1/2  for x = 1;

    F(x) = 7/8  for x = 2;

    F(x) =  1   for x = 3.
</pre>