Shoneh Halachos asked:
a) According to the Ran in 51a how did rebbi's wife sing in front of Bar Kafra?
b) In 49b R' Yehuda said that he's not allowed to take ribbis, but a Jew may take ribbis from a goy (therefor there is a chance of him being very happy on account of ribbis)
Binayahu Chayim, MI , USA
The Kollel replies:
a) The Ben Yehoyada says that Bar Kapara did not really mean that Rebbi's wife would sing for him, as we see that she did not in fact sing, and only said this in order to amuse those at the wedding. See also Ya'avetz in his Hagahos.
b) The Ya'avetz asks this and suggests that perhaps the authorities at that time and place did not allow Jews to lend money to gentiles for Ribis.
Dov Freedman