Close, but not totally correct. It is true most of the WTO member states are less developed countries (also known as third world countries) and its also true that for voting in the WTO every country has one vote.
But this does strange enough not mean that they have the strongest voice. How much a country has to say in the WTO is purely defined by its economic importance.
How dominant the role of the economically strong countries at the WTO is could e.g. be seen at the fact that recent negotiations about a WTO-membership of China were done by the US and not e.g. the Director General of the WTO
Voting barely takes place at the WTO (there have only been a few decisions at the WTO which were decided by voting). Most decisions are made by a so called "consensus model [1]".
A good example how this works could be seen at the last
decision on who should become the next Director General of the WTO. While
in the beginning the candidate from Thailand seemed to have a majority
of supporters, the other candidate from New Zealand hold to his candidacy.
The logical suggestion to decide via voting was rejected as destabilizing
the WTO system.
The resulting deadlock situation of several month was
finally resolved as follows:
The position of Director General got split in two periods
of three years after the candidate from Thailand backed down and offered
to take the second term [2].
Since as you see it
is not so simple as it seems, you still get:
0.5 points
[1] Some evil minded people say it's an acronym for bulling
[2] We want to stress that we don't think that one of the two candidates was better suited for the position than the other