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in 1994, the most common eye-related disease from which [#permalink]
08 Jan 2004, 07:42
0% (00:00) correct
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in 1994, the most common eye-related disease from which americans suffered was conjunctivitis, and glaucoma was a distant second.
glaucoma is much more common among patients who are more than 50 years old than it is among those who are 50 or younger, but the incidence rate for conjunctivitis is the same for people of all ages.
the average age of all americans is expected to exceed 50 by the year 2010.
which of the following conclusions can be most properly drawn about eye-related diseases from the information given?
a. conjunctivitis will remain the most common eye-related disease among americans in 2010.
b. by the year 2010, glaucoma will overtake conjunctivitis as the most common eye-related disease.
c. more people will suffer from conjunctivitis in 2010 than did in 1994.
d. most americans will encounter either conjunctivitis or glaucoma by 2010.
e. the average age of americans suffering from conjunctivitis will increase between 1994 and 2010.
and please tell me, how many minutes it took to solve.
you are right but i was wrong, since i chose (b) . anyway, here is the explanation:
let's paraphrase the three points of this inference question:
(1) conjunctivitis (or pinkeye, for those of you who want to know) was more common than glaucoma;
(2) glaucoma affects older people, but conjunctivitis affects everyone; and
(3) people are getting older. from this information, we know that since the average age of americans will rise, then the average age of pinkeye sufferers will also rise; (e) is the best choice. people have better success on this problem by ruling out the alternatives. (a) and (b) are opposites of each other. we don't know which disease will be more common, so they're both out. (c) is also tempting, but we don't know if it will the case. what if some new wonder drug is invented? and we most certainly know nothing about (d); most americans is awfully extremen.