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Difficulty:
45%
(medium)
Question Stats:
62% (01:37) correct
38%
(01:50)
wrong
based on 1713
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No chordates are tracheophytes, and all members of Pteropsida are tracheophytes. So no members of Pteropsida belong to the family Hominidae.
The conclusion above follows logically if which one of the following is assumed?
(a) All members of the family Hominidae are tracheophytes
(b) All members of the family Hominidae are chordates
(c) All tracheophytes are members of Pteropsida
(d) No members of the family Hominidae are chordates
(e) No chordates are members of Pteropsida
The conclusion above follows logically if which one of the following is assumed?
(a) All members of the family Hominidae are tracheophytes
(b) All members of the family Hominidae are chordates
(c) All tracheophytes are members of Pteropsida
(d) No members of the family Hominidae are chordates
(e) No chordates are members of Pteropsida
24 Aug 2012, 13:22
Kudos
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Its a 30 second question if you use Venn diagrams.
method: (draw as you read)
Draw two circles touching each other but they shouldn't overlap. Label one as C and the other as T. In T, draw a smaller circle and label it as P.
now the conclusion states that no member of P belongs to H.
This can only be possible in two ways. If H lies outside of both the bigger circles,C and T, or H lies inside C.
Now select the answer.
method: (draw as you read)
Draw two circles touching each other but they shouldn't overlap. Label one as C and the other as T. In T, draw a smaller circle and label it as P.
now the conclusion states that no member of P belongs to H.
This can only be possible in two ways. If H lies outside of both the bigger circles,C and T, or H lies inside C.
Now select the answer.
24 Dec 2013, 01:34
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email2vm
Hello email2vm
I'm glad to help.
ANALYZE THE STIMULUS:
Name:
C = chordates
T = tracheophytes
P = Pteropsida
H = Hominidae.
Argument says:
(1) C # T (No C = T)
(2) P = T (All P = T)
(3) Thus: P # H (No P = H)
If H = C --> P # H. Because If H = C --> H # T (according fact 1), but we also have P = T --> P # H (conclusion)
ANALYZE EACH ANSWER:
(a) All members of the family Hominidae are tracheophytes
Wrong. H = T --> P = H. Hence, wrong.
(b) All members of the family Hominidae are chordates
Correct. H = C --> H # T, but P = T --> H # P. Correct.
(c) All tracheophytes are members of Pteropsida
Wrong. T = P. This is fact #2. Clearly, it is an assumption.
(d) No members of the family Hominidae are chordates
Wrong. What if H # C, but H = T? --> P = H --> Clearly the conclusion P # H is wrong.
(e) No chordates are members of Pteropsida
Wrong. C # P. This is a combination of fact #1 and fact #2. The combination is still a FACT. It is not a hidden statement which is defined as an assumption by GMAT standards.
Hope it helps.
