Answer:
The probability that David will eat a healthy breakfast or that it will rain is 0.85 or 85%.
Step-by-step explanation:
Consider the provided information.
There is an 80% chance David will eat a healthy breakfast.
P(H) = 0.8
There is a 25% chance that it will rain.
P(R) = 0.25
The probability of David will eat a healthy breakfast and it will rain is:
P(H ∩ R)  = 0.8 × 0.25 = 0.2
P(H ∪ R) = P(H) + P(R) - P(H ∩ R)
P(H ∪ R) = 0.8 + 0.25 - 0.2
P(H ∪ R) = 0.85
Hence, the probability that David will eat a healthy breakfast or that it will rain is 0.85 or 85%.
