Question

Lucy wants to wear different clothes every day she was a dress is seven pairs of shoes and three pairs of earrings Lucy could use one just one pair of shoes and one pair of earrings every day however one dress and one pair of shoes don’t look pretty together so they cannot be selected together in such circumstances for how many days can she wear outfits differently

Answer 1

considering one combo of the dress and the shoes won't be an option, it leaves us with 18 possible combos