in a fish tank, there are 24 goldfish,2 angel fish, and 5 gopppies. if a fish is selected at random, find the probability that it is the goldfish or an angel fish?

Question

in a fish tank, there are 24 goldfish,2 angel fish, and 5 gopppies. if a fish is selected at random,  find the probability that it is the goldfish or an angel fish?

kropot72 · Answer

The total number of fish is 31.
The probability of selecting a goldfish is 24/31.
The probability of selecting an angelfish is 2/31.
The two events selecting goldfish, selecting angelfish are mutually exclusive therefore the probabilities must be added to find the probability of a goldfish or an angelfish.$$P(goldfish\ or\ angelfish)=\frac{24}{31}+\frac{2}{31}=you\ can\ calculate$$