CAPE Applied Mathematics Unit 1 · 2014 · Paper 1 · Question Q28
The random variable X has probability mass function P(X = x) for x = 3, 4, 5, 6 as shown below.
\begin{array}{|l|c|c|c|c|} \hline x & 3 & 4 & 5 & 6 \\ \hline P(X = x) & a & 0.5 & 0.2 & 0.1 \\ \hline \end{array}
The value of a is
- (A)0.1
- (B)0.2
- (C)0.3
- (D)0.4
This question uses a figure or table from the paper — you'll see it when you practise.
The answer is shown once you've answered.
Practise this question