| Exam Board | AQA |
|---|---|
| Module | AS Paper 2 (AS Paper 2) |
| Session | Specimen |
| Marks | 1 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Discrete Probability Distributions |
| Type | Direct probability from given distribution |
| Difficulty | Easy -1.8 This is a straightforward probability calculation requiring only reading values from a given table and adding P(X=3) + P(X=4) + P(X=5) = 0.07 + 0.03 + 0.16 = 0.26. It's a 1-mark multiple choice question testing basic understanding of discrete probability distributions with no problem-solving required, making it significantly easier than average. |
| Spec | 2.04a Discrete probability distributions |
| \(\boldsymbol{x}\) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 or more |
| \(\mathbf{P(X = x)}\) | 0.30 | 0.10 | 0.05 | 0.07 | 0.03 | 0.16 | 0.09 | 0.20 |
| Answer | Marks | Guidance |
|---|---|---|
| 13 | Circles correct answer | AO1.1b |
| Total | 1 |
Question 13:
13 | Circles correct answer | AO1.1b | B1 | 0.26
Total | 1The number of pots of yoghurt, $X$, consumed per week by adults in Milton is a discrete random variable with probability distribution given by
\begin{center}
\begin{tabular}{|c|c|c|c|c|c|c|c|}
\hline
$\boldsymbol{x}$ & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 or more \\
\hline
$\mathbf{P(X = x)}$ & 0.30 & 0.10 & 0.05 & 0.07 & 0.03 & 0.16 & 0.09 & 0.20 \\
\hline
\end{tabular}
\end{center}
Find $P(3 \leq X < 6)$
Circle the correct answer.
[1 mark]
0.26 \quad\quad 0.31 \quad\quad 0.35 \quad\quad 0.40
\hfill \mbox{\textit{AQA AS Paper 2 Q13 [1]}}