Letters into Mailboxes
Difficulty: Easy · Topics: Discrete Mathematics, Functions, Function Combinatorics
Xatlarni pochta qutilariga solish
Five different letters are put into three mailboxes A, B and C. Mailbox A must receive at least one letter.
In how many ways can this be done?
Beshta turli xat uchta A, B va C pochta qutilariga solinadi. A qutiga kamida bitta xat tushishi kerak.
Buni necha xil usulda bajarish mumkin?