If we sample from a small finite population without​ replacement, the binomial distribution should not be used because the events are not independent. If sampling is done without replacement and the outcomes belong to one of two​ types, we can use the hypergeometric distribution. If a population has A objects of one​ type, while the remaining B objects are of the other​ type, and if n objects are sampled without​ replacement, then the probability of getting x objects of type A and n−x objects of type B under the hypergeometric distribution is given by the following formula. In a lottery​ game, a bettor selects six numbers from 1 to 60 ​(without repetition), and a winning six​-number combination is later randomly selected. Find the probabilities of getting exactly four winning numbers with one ticket.​ (Hint: Use A=6​, B=54​, n=6​, and x=4​.)

​P(4​)= ??

sounds like you have the formula, as well as the numbers to use.

So, what's the problem?