T=[["gabriela",62,45],["jose",48,52],["rosa",56,35],["matias",49,48]]

def promedioPregunta(tabla):
	print "promedios por pregunta"
	for i in range (1,len(T[0])):
		suma = 0
		for j in range(0, len(T)):
			suma += T[j][i]
		print "Promedio pregunta " + str(i) + ":" + str((suma + 0.0)/len(T))
	print ""

def promedioAlumno(tabla):
	print "Promedio por alumno"
	for info in T:
		print "Alumno: " + info[0]
		suma = 0
		for nota in info[1:]:
			suma += nota
		print "Promedio: " + str((suma + 0.0)/len(info[1:])) + "\n"

promedioPregunta(T)
promedioAlumno(T)