Refer to the demographic information shown to the right that has been collected
ID: 3136201 • Letter: R
Question
Refer to the demographic information shown to the right that has been collected by an instructor after surveying her class The instructor randomly chooses one student to pass out papers, one student to clean the chalkboard, and one student to empty the trash If a student may do more than one job, then what is the probability that the instructor will choose all girls to do the jobs? Total number of students in the class Number of boys Number of girls Number of Freshman Number of Sophomores Number of Juniors Number of Seniors 23 32 16 18 14 There is a % probability that all gils will be chosen to do the jobs Round to one decimal place as needed)Explanation / Answer
P(choosing a girl) = 23/55 = 0.42
P(choosing three girls) = 0.423 = 0.074 = 7.4% (ans)