Final answer:
There are 65,780 ways Ezra can choose five goldfish from a tank of 26.
Step-by-step explanation:
The question is asking how many ways Ezra can choose five goldfish from a tank of 26. This is a combination problem, since the order doesn't matter and repetition is not allowed. The formula for combinations is C(n, r) = n! / (r! * (n-r)!), where n is the total number of items and r is the number of items chosen. In this case, n=26 and r=5. Plugging these values into the formula, we get:
C(26, 5) = 26! / (5! * (26-5)!) = 26! / (5! * 21!) = (26 * 25 * 24 * 23 * 22) / (5 * 4 * 3 * 2 * 1) = 65,780.
Therefore, there are 65,780 ways Ezra can choose five goldfish from the tank.