X=the number of people who answer a question correct when 80 people are asked and the chance of getting the correct answer is 0.13. Calculated the mean of X.

Carson has only $20 bills and $10 bill in her wallet. the total value of the bills is $50. she has 1 more $20 bill than $10 bills. how many each kind of bill does carson have? a. one $20 and two $10 bills b. two $20 bills and one $10 bill c. one $20 bills and three $10 bills d. two $20 bills and two $10 bills

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

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?