EXHIBIT (L)(24)

                               PURCHASE AGREEMENT


        The RBB Fund, Inc. (the "Company"), a Maryland corporation, and Robeco
USA, L.L.C., through its division Weiss, Peck & Greer Investments ("Weiss,
Peck") intending to be legally bound, hereby agree with each other as follows:

        1.      The Company hereby offers Weiss, Peck and Weiss, Peck hereby
purchases one share of Class UUU Common Stock of the Robeco WPG Tudor Fund (par
value $.001 per share) (such shares hereinafter sometimes collectively known as
"Shares") at the closing price per Share (net asset value) of the Predecessor
Fund on the date prior to the date of the reorganization.

        2.      The Company hereby acknowledges receipt from Weiss, Peck of
funds in the amount of $15.89 in full payment for the Shares.

        3.      Weiss, Peck represents and warrants to the Company that the
Shares are being acquired for investment purposes and not with a view to the
distribution thereof.

        4.      This agreement may be executed in counterparts, and all such
counterparts taken together shall be deemed to constitute one and the same
instrument.

        IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the 29th day of April, 2005.



                                  THE RBB FUND, INC.


                                  By:/s/ Edward J. Roach
                                     -------------------
                                         Edward J. Roach
                                         President & Treasurer



                                  ROBECO USA, L.L.C., through its division
                                  WEISS, PECK & GREER INVESTMENTS



                                  By:/s/ Daniel Vandivort
                                     --------------------
                                         Name: Daniel Vandivort
                                         Title: Chairman of the Board