If 45% of nursing students are able to pass a drug calculation test, find the mean, variance, and standard deviation of the number of students who pass the test in a sample of 180 nursing students.

I know how to find mean when I have a list of numbers but I am not sure what to do with just one.

I am thinking that with the .45 I will use .55 somehow but again not sure.

Just so you know I am a 45 year old who decided to go back to school and statistics is not being kind to me.