Construct the probability distribution of particular experiment by following the instructions given to you.

A dog gave birth to a litter of six puppies. Three of them are male while the rest are female. If you are to be given three of these puppies at random, list all the elements of the sample space using the letters M and F for male puppies and female puppies, respectively. Then assign a value x of the random variable X representing the number of male puppies you receive