I would suppose. I got the question from the GMAT paper tests (retired GMAT questions).

My bet is B.

A. Vacationers accout for a majority of visitors. Local residents may be minority. Hence, this does not account for the difference.

C. Newly constructed pure aquarium... We dont know about the numbers of existing pure aquarium/zoo. Hence we dont know the relative numbers of pure aquarium/zoo.

D. People who visit a zoo ..... what about people who do not visit a zoo??

E. is comparing Zoo aquariums. We need to compare pure aquariums and zoo.

B. Explains the diff in visitors.

If we have a single railway station in city, obviously the station is crowded. If we have many railway stations in the city and each train can be boarded in any station, the crowd is dispersed accross all stations.

keepsmilinyaar wrote:can we expect such a complex question on the GMAT?

Oh YEAH!!! :twisted:

logitech wrote:

keepsmilinyaar wrote:can we expect such a complex question on the GMAT?

Oh YEAH!!! :twisted:

in fact this from retired papers sold in the bundle of 3..

chek this guys ...one of the best explanations given by Ron (lunarpower)

https://www.beatthegmat.com/cr-pure-aqua ... 19532.html

Really tricky one

In the United States, vacationers account for more than half of all visitors to what are technically called “pure aquariums” but for fewer than one quarter of all visitors to zoos, which usually include a “zoo aquarium” of relatively modest scope.

Which of the following, if true, most helps to account for the difference described above between visitors to zoos and visitors to pure aquariums?

(A) In cities that have both a zoo and a pure aquarium, local residents are twice as likely to visit the aquarium as they are to visit the zoo.
(B) Virtually all large metropolitan areas have zoos, whereas only a few large metropolitan areas have pure aquariums.
(C) Over the last ten years, newly constructed pure aquariums have outnumbered newly established zoos by a factor of two to one.
(D) People who visit a zoo in a given year are two times more likely to visit a pure aquarium that year than are people who do not visit a zoo.
(E) The zoo aquariums of zoos that are in the same city as a pure aquarium tend to be smaller than the aquariums of zoos that have no pure aquarium nearby.

Guys here is the answer to the riddle:

Visitors to any public establishment consists of 2 types of visitors: locals + vacationers (people who visit on holidays or free time)

We have 2 types of visiting places: Pure Aquarium and Zoo (Aquarium)

What is given:
1. Vacationers account for 50% for Pure Aquarium
2. Vacationers account for 25% for Zoo(Aquarium)

1 implies that for Pure Aquariums 50% of visitors are locals and 50% are vacationers
2 implies that for Zoos 75% of visitors are locals and 25% are vacationers

What does this mean?

A. Vacationers ONLY visit what they do not have access to in their daily lives locally. This means that there must be lot of Zoos and less Pure Aquariums.

B. And large majority of US population lives in metropolitan areas.

Combining A&B out of the choices B is the best answer.