Probability of all the four sons to a couple is

Probability of four sons to a couple is :

Probability of four son to a couple is :-

Probability of four son to a couple is :-

What is the probability of three daughters to a couple in three children :-

What is the probability of three daughters to a couple in three children :-

Four cards are drawn at random from a pack of 52 cards find the probability of getting all the four cards of same number .

Four cards are drawn at random from a pack of 52 cards find the probability of getting all the four cards of different numbers .

Four cards are drawn from a full pack of cards . Find the probability that all the four are spades , and one of them is a king , and