MVA
Evo23
Not a Official GMAT type question. What is the source?
This question comes from a bundle of CR questions gathered together by a prep school, but I didn't mean to provide the forum with an unreliable question.
If anybody else agrees with you, I will delete this post.
Apologies
It is good question. I don't think it should be deleted.
Quote:
Consider three fish swimming together in a school. The space within which each fish can be seen by predator Y is defined by a sphere centered on the fish and having a radius that is the maximum distance Y can see. The school is vulnerable to attack when Y is within one of the three spheres. The spheres overlap to a great extent, since the fish are in a compact group.
Few important terms in above statement : SCHOOL, SPACE, RADIUS, SPHERES, OVERLAP.
QUESTION: Identify Reliable Inference.
Let's find out which option is reliable Inference.
Quote:
(A) The vulnerability to attack of the school as a whole is not much greater than the vulnerability to attack of any one fish in the school.
Last statement of paragraph says "The spheres overlap to a great extent, since the fish are in a compact group". It means probability to attach one fish and school of fish is almost same.
This option looks good. Please keep it.
Quote:
(B) There is less chance that predator Y will attack a school of four fish than that it will attack a school of three fish.
paragraph is mostly about SCHOOL of Fish and Single single. We are not worried about if School is of 3 fish or 4 fish.
Quote:
(C) Fish who swim I schools are less likely to be devoured by predators than are fish who do not swim in schools.
Paragraph doesn't say anything about fish which doesn't swim in school.
Quote:
(D) The maximum distance at which an individual fish is visible depends less on the size of the fish than on whether the fish is swimming in a school.
We do not know anything what is the impact of size of fish on whole conversation.
Quote:
(E) The maximum distance at which predator Y can see its prey is increased if Y is itself swimming in a school of Y’s.
Again, nothing is mentioned what will happen when Y swims in school.
A is answer.