Hi,

5	0.12	0.6	3

6	0.23	1.38	8.28

7	0.4	2.8	19.6

8	0.12	0.96	7.68

9	0.09	0.81	7.29

10	0.04	0.4	4

	    m = 6.95	49.85

		48.30	-48.30

			1.55

			1.24  SD

75% of time

z = .6745 = (x-6.95)/1.24 , x = 7.79 0r 8 rounded Up to nearest whole number

75% of the time there can be as many as 8 cars daily to be washed

TWO service points:  if they all come at once...



Re Reply: three independent projects  

Each of the three projects has probability of being profitable equal to 0.5

P(knowing that two of the three projects indeed bring profit,  that the third project is profitable) = .5

 

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