A study conducted at a certain high school shows that 72% of its graduates enroll at a college. Find the probability that among 4 randomly selected graduates, at least one of them enrolls in college.

And we can use the probability mass function and we got:

And replacing we got:

Step-by-step explanation:

Let X the random variable of interest "number of graduates who enroll in college", on this case we now that:  

The probability mass function for the Binomial distribution is given as:  

Where (nCx) means combinatory and it's given by this formula:  

We want to find the following probability:

And we can use the complement rule and we got:

And we can use the probability mass function and we got:

And replacing we got:

idk man good luck man