1. The expected value of a binomial distribution is the average number of successes out of `n` trials.

2. The expected value of a binomial distribution is `µ` ＝ `np`.

8. For (a), find the graph showing the most common result being 30% of the trials are successes.

10. Only 5% of trials are successes, so it is likely that `r` will be very low and unlikely that it will be high.

12. For (a), do `binompdf(n,p,r)`

, where `n` is 8 syringes, `p` is 1% chance of being defective, and `r` is done separately for each possible outcome, 0 through 8.