At a pet store 4 goldfish are selected at random from each group of 50. At this rate, how many goldfish will be selected in total if the pet store has 2000 goldfish?
Choice B is correct.
Since, 4 goldfish are selected from a group of 50.
Therefore, the number of goldfish that will be selected out of 2000 goldfish will be,
(4/50) * 2000 = 160.