Suppose that 90% of graduating students attend their graduation. A group of 30 graduating students is randomly chosen. Let X be the number of students that attend graduation. As we know, the distribution of X is a binomial probability distribution.
- What are the number of trials (n)?
- What is the probability of successes (p)?
- What is the probability of failures (q)?
- How many students are expected to attend graduation?
- What is the probability that exactly 25 students attend graduation?