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Question Practice
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Question 1
A random variable $X$ has the probability distribution: \[\begin{array}{c|ccccccccc} x & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\ \hline P(X=x) & a & 3a & 5a & 7a & 9a & 11a & 13a & 15a & 17a \end{array} \]The value of $a$ is:
A.
$\dfrac{1}{81}$
B.
$\dfrac{2}{82}$
C.
$\dfrac{5}{81}$
D.
$\dfrac{7}{81}$
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