Apopuli.155
net.math
utzoo!decvax!ucbvax!G:shallit
Wed Apr 21 10:22:30 1982
A Number Theory Problem
Let n be a positive integer, and consider the C(2n,n) subsets of
n elements chosen from 1,2, ... 2n.  What is the expected value of
the lcm of a subset, assuming each subset equally likely?
/Jeff Shallit, Department of Mathematics, UC Berkeley, CA 94720