The mean of a, b,c, d is 12 & mean of e, f is 6.find the mean of a, b,c, d,e, f

Which value of c would make he following expression completely factored? 8x+cy

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.