Let X, Y be independent exp(A) random variables. Let S = X +Y. Find the conditional density of X given S. Show that X/S is independent of S.

Not the complete answer

Using Pyhton, answer questions 2 - 4.

& 7. CARPET You just carpeted a 9 foot by 12 foot room for $480. The carp is priced by the square foot. About how much would you expect to pay for the same carpet in another room that is 21 feet by 28 feet? (Lesson 11.3)