Who amongst P Q R S and T is the first to take the lecture I P takes lecture before S and Q but not ...........

Logical Reasoning(Master ) Data Sufficiency

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Who amongst P, Q, R, S and T is the first to take the lecture?

I. P takes lecture before S and Q but not before T.

II. R is not the first to take the lecture.

III. S is not the last to take the lecture.

Only I and either II or III

Question cannot be answered even with all the statements together

Only statement I

Only statement III

Both statement I and II

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Explanation:

From statement I:
P > S, P > Q, T > P
From statement II:
R is not the first to take the lecture.
From statement III:
S is not the last to take the lecture.
Both statements I and II together:
T > P > S, Q and R is not the first to take the lecture.
Hence, T takes the first lecture.
So, statement I and II together are necessary to answer the question.