CAPE Applied Mathematics Unit 1 · 2016 · Paper 1 · Question Q28
The random variable, X, has a probability mass function P(X = x) for x = 3, 4, 5, 6 as shown in the following table.
\begin{tabular}{|l|c|c|c|c|}
\hline
x & 3 & 4 & 5 & 6 \\
\hline
P(X = x) & a & 0.5 & 0.2 & 0.1 \\
\hline
\end{tabular}
The value of a is
- (A)0.1
- (B)0.2
- (C)0.3
- (D)0.4
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