##Titulo.2 nivel 2
###Titulo.3 nivel 3
sample(5:20,10,replace=FALSE)
## [1] 18 12 10 7 14 16 13 20 9 11
sample(70:80,size = 20,replace = TRUE)
## [1] 78 80 79 78 80 71 72 78 77 76 71 75 74 71 71 74 75 76 77 73