3. Twenty percent (20%) of the customers of a store buy cigars. Half of the customers who buy cigars buy beer. About 45 percent buy beer. The table is given below: Cigar\Beer Buy Beer No Beer Total

Buy Cigar 0.10 0.20

No Cigar

Total 0.45

A customer is known to not buy beer. Determine the probability that this customer will buy Cigar.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?