Question 117138
200 people were sampled and the following table shows the number of people with a certain average electric energy usage based upon the type of home an individual lives in:
		
	Electric Usage (in kWh)
Type of Dwelling< 5,000	5,000 – 7,000 	7,000 – 11,000	11,000 – 15,000	Total
Single Family	15	35	65	25	140
Multi-Family	25	15	15	5	60
Total	        40	50	80	30	200

a)	What is the probability of selecting someone who uses between 7,000 and 11,000 kWh?
Ans: 30/200
------------------
b)	What is the probability of randomly selecting someone who uses less than 5,000 kWh and who lives in a multi-family dwelling?
Ans: 25/200
c)	What is the probability of selecting someone who lives in a single family dwelling or uses between 5,000 and 7,000 kWh?
Ans: 35/200
==================
Cheers,
Stan H.