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The principle of a school wants to arrange 5 students on the [#permalink]
25 Jan 2004, 11:33

The principle of a school wants to arrange 5 students on the platform such that the boy ROBERT occupies the second position and that NELLIE is always adjacents to the girl MELANIE. How many such arrangements are possible?

a.2
b.8
c.4
d.16
e.11

_________________

Pls include reasoning along with all answer posts.
****GMAT Loco****
Este examen me conduce jodiendo loco

The question needs to clarify the meaning of "second position" whther it is second from either end or just from the left side. The answer changes depending on this clarification. 8 is answer only if we assume that the second position is from LEFT. If assume the second position from either end, the answer would be 16.

I am not sure whether an ETS question will make this clarification or not.

the way I did was R position is fix so 4 positions remaining

out of 4 N&M can be arrenged in 6 ways with the given condition and the rest 2 can be in 2! with total of 8 ways.

please correct me if i am wrong in my approach. These Permutations, Combinations and probablility are my biggest headaches. Any suggestions on the study/practice materials of those