Answer:
Each of the three friends will get one-sixth of the Thomas's enitre marble collection.
Explanation:
Fraction of the total marble collection brought by Thomas =

Now, Thomas divides these marbles equally among his three friends. So, each of the three friends will get one-third of the total marble collection brought by Thomas.
Fraction of total marble collection got by each friend =

=

∴ Each of the three friends of Thomas will get one-sixth of his entire collection of marbles.