| Exam Board | Edexcel |
|---|---|
| Module | D1 (Decision Mathematics 1) |
| Year | 2021 |
| Session | June |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Combinations & Selection |
| Type | Describing or comparing sampling methods |
| Difficulty | Moderate -0.8 This is a standard D1 question involving reading a distance/network table and likely applying a basic algorithm (e.g., nearest neighbour or minimum spanning tree). D1 questions are typically procedural with clear algorithms to follow, requiring minimal problem-solving insight—easier than average A-level maths questions. |
| Spec | 7.04a Shortest path: Dijkstra's algorithm |
| A | B | C | D | E | F | G | |
| A | - | 21 | 17 | 25 | 31 | 41 | |
| B | 21 | - | 26 | 27 | 12 | 15 | 20 |
| C | 26 | - | 17 | 11 | 46 | ||
| D | 17 | 27 | - | 15 | 47 | ||
| E | 25 | 12 | 17 | 15 | - | 6 | 32 |
| F | 31 | 15 | 11 | 6 | - | 35 | |
| G | 41 | 20 | 46 | 47 | 32 | 35 | - |
| 7. \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) \(\_\_\_\_\) | Leave blank | \includegraphics[max width=\textwidth, alt={}]{44ddb176-e265-4545-b438-c1b5ffb40852-26_2652_103_115_1955} |
17 \\
25 \\
31 \\
15 \\
11 \\
46 \\
17 \\
27 \\
- \\
15 \\
47 \\
E \\
32 \\
F \\
35 \\
G \\
- \\
} & \\
\hline
& & & & & & & & \\
\hline
\begin{center}
\begin{tabular}{|l|l|l|l|l|l|l|l|}
\hline
& A & B & C & D & E & F & G \\
\hline
A & - & 21 & & 17 & 25 & 31 & 41 \\
\hline
B & 21 & - & 26 & 27 & 12 & 15 & 20 \\
\hline
C & & 26 & - & & 17 & 11 & 46 \\
\hline
D & 17 & 27 & & - & 15 & & 47 \\
\hline
E & 25 & 12 & 17 & 15 & - & 6 & 32 \\
\hline
F & 31 & 15 & 11 & & 6 & - & 35 \\
\hline
G & 41 & 20 & 46 & 47 & 32 & 35 & - \\
\hline
\end{tabular}
\end{center}
\begin{center}
\includegraphics[max width=\textwidth, alt={}]{44ddb176-e265-4545-b438-c1b5ffb40852-22_2646_1840_116_114}
\end{center}
6.
\begin{center}
\begin{tabular}{|l|l|l|}
\hline
7. $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ $\_\_\_\_$ & Leave blank & \includegraphics[max width=\textwidth, alt={}]{44ddb176-e265-4545-b438-c1b5ffb40852-26_2652_103_115_1955}
\\
\hline
\end{tabular}
\end{center}
\begin{center}
\includegraphics[max width=\textwidth, alt={}]{44ddb176-e265-4545-b438-c1b5ffb40852-28_2647_1835_118_116}
\end{center}
\hfill \mbox{\textit{Edexcel D1 2021 Q17}}