5. How many ways are there to pick a man and a woman who are not husband and wife from a group of n married couples? 6.
Posted: Tue Sep 07, 2021 7:52 am
5. How many ways are there to pick a man and a woman who are not husband and wife from a group of n married couples? 6. How many 5-letter sequences (formed from the 26 letters in the alphabet, with repetition allowed) contain exactly one A and exactly two Bs?