- Corrected the calculation of P(10 <= X <= 15) to use the correct interval length.
- Corrected the calculation of P(25 <= X <= 30) to use the correct interval length.
- Corrected the calculation of P(0 < X < 5) to use the correct interval length.
- Corrected the calculation of P(15 < X < 20) to use the correct interval length.