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Category: Probability and Statistics

What-is-the-probability-that-in-a-class-of-18-people-there-exists-a-group-of-3-people-born-on-the-same-day-of-the-week-

Question Number 199310 by necx122 last updated on 01/Nov/23 $${What}\:{is}\:{the}\:{probability}\:{that}\:{in}\:{a}\:{class}\: \\ $$$${of}\:\mathrm{18}\:{people},\:{there}\:{exists}\:{a}\:{group}\:{of}\:\mathrm{3} \\ $$$${people}\:{born}\:{on}\:{the}\:{same}\:{day}\:{of}\:{the} \\ $$$${week}? \\ $$ Commented by AST last updated on 01/Nov/23…