Samantha is preparing to do a survey of the language classes taken by ninth and tenth graders at her high school. Each student in ninth and tenth grade takes one language class. From school records, she knows there are 158 students in the ninth grade, as shown in the table. Language
Grade French Mandarin Spanish Total
9 r s t 158
10 x y z
Total

Based on school records, Samantha finds out that there are 65 students in ninth grade who take Spanish and 35 students in ninth grade that take French. Find the conditional probability that a student takes Mandarin, given that the student is a ninth grader. Round to the nearest tenth.

The probability that a ninth grader is taking Mandarin is about
%.

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

On saturday a souvenir shop had 125 customers. sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.