In aquarium A there are 2 yellow fish and 2 green ones, in aquarium B there are 3 yellow fish and 4 green ones. An aquarium is chosen at random, what is the probability of picking up a green fish out of aquarium A?	Choose the correct choice: A) 1/2. B) 3/5. C) 1/4. D) 1/3. E) 2/3.
Probability of picking up one aquarium out of two= 1/2   probability of picking 1 green fish from aquarium A= 2/4=1/2   Hence the desired probability= 1/2*1/2= 1/4   1/4. is the answer
<result>C</result>
In aquarium A there are 2 yellow fish and 2 green ones, in aquarium B there are 3 yellow fish and 4 green ones. An aquarium is chosen at random, what is the probability of picking up a green fish out of aquarium A?