Question 1196769
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Hi
Using an Excel Spreadsheet
# 	p	p*(#)	
1	0.01	0.01	
2	0.02	0.04	
3	0.02	0.06	
4	0.1	0.4	
5	0.1	0.5	
6	0.15	0.9	
7	0.25	1.75	
8	0.2	1.6	
9	0.1	0.9	
10	0.05	0.5	
	1	6.66 sum 
μ = E(Number of checkout Lanes) = 7 

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