The probability of event A is 0.4 and event B is 0.3, with A and B independent. Find the probability that at least one of A or B occurs.
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- L = 9.8 \left(\frac{4}{2\pi}\right)^2 = 9.8 \left(\frac{2}{\pi}\right)^2 \approx 9.8 \cdot 0.4053 \approx 3.97 \, \text{m}
- The length of the pendulum is approximately 3.97 meters.
- #### 3.97
- For independent events,
- P(A \cup B) = P(A) + P(B) - P(A \cap B) = 0.4 + 0.3 - (0.4 \cdot 0.3) = 0.7 - 0.12 = 0.58
- The probability that at least one occurs is 0.58.
