Scala - Winning combinations at the lottery

Lottery.scala

import scala.util.Random

def winningCombinationsFor(max: Int = 49, numDrawn: Int = 6, minNumToWin: Int = 3): Seq[Set[Int]] = {
  val (draw, remainder) = Random.shuffle(1 to max).splitAt(numDrawn)
  for {
    numPickedFromDraw <- minNumToWin to numDrawn
    subsetFromDraw <- draw.toSet.subsets(numPickedFromDraw)
    subsetFromRemainder <- remainder.toSet.subsets(numDrawn - numPickedFromDraw)
  } yield subsetFromDraw ++ subsetFromRemainder
}