https://prepswift.gregmat.com/quizzes/quiz/prepswift-piece-by-piece (Question 5)
What about the possibility that they get zero gifts. That brings it to 11 different options per pair → 11^3.
https://prepswift.gregmat.com/quizzes/quiz/prepswift-piece-by-piece (Question 5)
What about the possibility that they get zero gifts. That brings it to 11 different options per pair → 11^3.
I don’t think the wording of the question allows that.