Five Mercedes E550 vehicles are shipped to a local dealership. The dealer sells one E550 in any week with probability 0.3 and otherwise sells none in that week. When all E550s in stack have been sold, the dealer requests a new shipment of ve such cars, and it takes 1 week for that delivery to occur. Let Xn = the number of Mercedes E550s at this dealership n weeks after the initial delivery of ve cars.

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?

Atotal of 505 tickets were sold for a school play they were either adult tickets or student tickets they were 55 more student tickets so than adult tickets how many adult tickets were sold ?

Can someone me with these questions? ?