  The Principle of Maximum Entropy, a powerful and general method for inferring
the distribution function given a set of constraints, is applied to deduce the
overall distribution of 3D plasmoids (flux ropes/tubes) for systems where
resistive MHD is applicable and large numbers of plasmoids are produced. The
analysis is undertaken for the 3D case, with mass, total flux and velocity
serving as the variables of interest, on account of their physical and
observational relevance. The distribution functions for the mass, width, total
flux and helicity exhibit a power-law behavior with exponents of $-4/3$, $-2$,
$-3$ and $-2$ respectively for small values, whilst all of them display an
exponential falloff for large values. In contrast, the velocity distribution,
as a function of $v = |{\bf v}|$, is shown to be flat for $v \rightarrow 0$,
and becomes a power law with an exponent of $-7/3$ for $v \rightarrow \infty$.
Most of these results are nearly independent of the free parameters involved in
this specific problem. A preliminary comparison of our results with the
observational evidence is presented, and some of the ensuing space and
astrophysical implications are briefly discussed.
