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IB Mathematics: Applications and Interpretation HL · AHL 7: Markov Chains & Transition Matrices · AHL 7.3

Steady state and long-term probabilities Problem set B Answers

Skills

  1. \(\begin{pmatrix} 0.225 \\ 0.360 \\ 0.416 \end{pmatrix}\)

  2. \(−0.57 s_1 + 0.24 s_2 + 0.33 s_3 = 0\); \(0.37 s_1 − 0.54 s_2 + 0.09 s_3 = 0\); \(s_1 + s_2 + s_3 = 1\)

    1. (a) \((\frac{38}{65}, \frac{27}{65})\)
    2. (b) \((\frac{4}{19}, \frac{8}{19}, \frac{7}{19})\)
  3. \((\frac{3}{13}, \frac{5}{26}, \frac{5}{13}, \frac{5}{26})\)

    1. (a) \(\begin{pmatrix} 0.332 \\ 0.342 \\ 0.326 \end{pmatrix}\)
    2. (b) \(\begin{pmatrix} 0.310 \\ 0.293 \\ 0.121 \\ 0.276 \end{pmatrix}\)
  4. \(\begin{pmatrix} 0.193 \\ 0.295 \\ 0.230 \\ 0.283 \end{pmatrix}\)

  5. 0.36

    1. (a) \(\begin{pmatrix} 0.282 & 0.282 & 0.282 \\ 0.527 & 0.527 & 0.527 \\ 0.191 & 0.191 & 0.191 \end{pmatrix}\)
    2. (b) 19.1%

In context

    1. (a) \(\begin{pmatrix} 0.92 & 0.53 \\ 0.08 & 0.47 \end{pmatrix}\)
    2. (b) 0.849
    3. (c) \((\frac{53}{61}, \frac{8}{61})\). Long-term probability \(\frac{53}{61}\)

Stretch

    1. (a) \(p \times 0.4 + 0.28 \times 0.6 = 0.4\)
    2. (b) p = 0.58

jmaths.xyz · AI HL · AHL 7.3 Steady state and long-term probabilities