on *:TEXT:!random*:#:{
  if ($2 == number) {
    msg $chan $rand(1,10) %+ $rand(1,10) $+ $rand(1,10)
  }
  if ($2 == text) {
    msg $chan $rand(a,z) $+ $rand(a,z) $+ $rand(a,z) $+ $rand(a,z)
  }
  if ($2 == $null) {
    msg $chan $nick Please select either Number or Word.
  }
}

By the way, you have $number and $text