Astudy of immunizations among school‑age children in california found that some areas have rates of unvaccinated school‑age children as high as 13.5 % . let x be the number of children not vaccinated in a randomly selected classroom of 30 children in one such area. (a) what is the distribution of x ? x has a normal distribution. x has a poisson distribution. x has a binomial distribution. none of the listed distributions are correct. (b) how many unvaccinated children do we expect, on average, in randomly selected classrooms of 30 children? (enter your answer rounded to the nearest whole number.)

The probability that a u.s. resident has traveled to canada is 0.18 and to mexico is 0.09. a. if traveling to canada and traveling to mexico are independent events, what is the probability that a randomly-selected person has traveled to both? (page 109 in the book may ) b. it turns out that only 4% of u.s. residents have traveled to both countries. comparing this with your answer to part a, are the events independent? explain why or why not. (page 119 may ) c. using the %’s given, make a venn diagram to display this information. (don’t use your answer to part a.) d. using the conditional probability formula (page 114 in the book) and the %’s given, find the probability that a randomly-selected person has traveled to canada, if we know they have traveled to mexico.