How many suitors have come to woo Portia?Why are they said to be 4 in no.

Portia's suitors are as follows (these are the suitors who choose between the caskets); the Prince of Morocco, the Prince of Arragon, and Bassanio. There are a number of suitors who wish to woo Portia, but these three actually take their chances at choosing the correct casket.

3 suitors have come to open the casket to marry Portia , who were Prince of Morocco, Prince of Arragon , and Bassanio