If the question only gives you this information, then I think is not reasonable to say that Zach needs 4 gallons of water. I don't think any dog's bowl is large enough that needs 4 gallon of water to fill it up. Plus, there's no any other information such as why specifically requires 4 gallons instead of x (other numbers) gallons.
Step-by-step explanation:The probability of picking the biased coin: P(biased coin)=1/100. The probability of all three tosses is heads: P(three heads)=1×1+99×18100. The probability of three heads given the biased coin is trivial: P(three heads|biased coin)=1.
