math  statistics
posted by Jummy .
Rooms NO of units
1 471
2 1470
3 11715
4 23468
5 24476
6 21327
7 13782
8+ 15647
compute the following conditional probablilites directly that is, do not use the conditional probability rule. For a U.S. housing unit selected at random, determine
a. the probability that the unit has exactly four room.
b. the conditional probablility that the unit has exactly four rooms given that it has at least 2 room
c. the conditinal probability that the unit has at most four rooms, given that it has at least two rooms.
d. interpret your answers in parts (a)(b) in terms of percentages.

Take a shot. What do you think. Hint: an Excel spreadsheet is very helpful for these types of problems.