The mode<span> of a data </span>set<span> is the </span>number<span> that occurs most frequently in the </span>set<span>. To easily </span>find the mode<span>, put the </span>numbers<span> in order from least to greatest and count how many times each </span>number<span> occurs. The </span>number<span> that occurs the most is the </span>mode<span>!</span>
There are a total of 31 fish in the tank. Therefore, the probability of it being a goldfish is 24/31 or about 77.4%, since there are 24 goldfish. The probability of it being an angel fish is 2/31 or about 6.45%, for the same reason as before.