The number of molecules/ions having trigonal bipyramidal shape is:
\(\text{PF}_5, \, \text{BrF}_5, \, \text{PCl}_5, \, [\text{PtCl}_4]^{2-}, \, \text{BF}_3, \, \text{Fe(CO)}_5\)
PF5, PCl5, and Fe(CO)5 have trigonal bipyramidal geometry.
BrF5: square pyramidal
[PtCl4]2−: square planar
BF3: trigonal planar