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3 votes
A fish tank contains 18 goldfish and 22 guppies. If you randomly select 2 fish, what is the probability that they are both goldfish?

A.1/20
B.51/260
C.1/22
D.1/36

User Lenek
by
8.7k points

2 Answers

1 vote

51/260~~~~~~~~ APEX

User Karl Der Kaefer
by
7.8k points
3 votes
The total number of fish available in the tank is (18 + 22) = 40. We want to randomly select 2 fish and come up with 2 goldfish. The probability for 1 goldfish to be taken out would be 18/40. Now, after drawing the first fish, the probability to get another goldfish would be 17/39. And the probability to draw 2 goldfish would be the product of both probabilities. P = (18/40)(17/39) = 51/260 Thus, the answer is B.
User Luke Dennis
by
8.6k points
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