A selection committee held a meeting to choose a student leader. Those who attended the meeting were 20 first semester students, 30 second semester students, 10 third semester
students and 20 fourth semester students. Find the probability of the semester from which the
student leader would be chosen if first semester students are not qualified to be a student
leader​

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

The police chief wants to know if the city’s african americans feel that the police are doing a good job. identify the management problem (i.e dependent variable) and identify the independent variable.