Re: Jared will pick 3 friends to join him on a road trip. His friend group
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29 Dec 2023, 16:54
Another way to do it that I think requires less calculations:
# of total combinations if poet/musician didn't matter - # of combos with no poets - # of combos with no musicians = # of combinations with at least one musician and at least one poet.
# of total combinations if poet/musician didn't matter = 7 choose 3 = 35
# of combos with no poets = 3 choose 3 = 1
# of combos with no musicians = 4 choose 3 = 4
35-1-4 = 30
Video for more info/explanations: Search Tested Tutor Advanced Combinations