Exercise Answers: Module 29

Probability

  1. \frac{6}{36}=\frac{1}{6}
  2. \frac{2}{36}=\frac{1}{18}
  3. \frac{8}{36}=\frac{2}{9}
  4. \frac{36}{36}=1
  5. \frac{0}{36}=0
  6. \frac{4}{36}=\frac{1}{9}
  7. \frac{32}{36}=\frac{8}{9}
  8. \frac{6}{36}=\frac{1}{6}
  9. \frac{30}{36}=\frac{5}{6}
  10. \frac{15}{60}=\frac{1}{4}
  11. \frac{27}{60}=\frac{9}{20}
  12. \frac{42}{60}=\frac{7}{10}
  13. \frac{1}{4}=25\%
  14. \frac{3}{4}=75\%
  15. \frac{2}{4}=50\%
  16. \frac{2}{4}=50\%
  17. \frac{8}{250}=3.2\%
  18. \frac{242}{250}=96.8\%
  19. we should expect 968 copies to be acceptable
  20. \frac{44}{200}=22\%
  21. we should expect 220 tax returns to have errors
  22. 22\%=0.22
  23. (0.22)^2\approx4.8\%
  24. (0.22)^3\approx1.1\%
  25. 0.22\cdot0.78\approx17.2\%
  26. 0.78\cdot0.22\approx17.2\%
  27. (0.78)^2\approx60.8\%
  28. (0.78)^3\approx47.5\%
  29. 1-(0.78)^3\approx52.5\%

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