50 



BELL SYSTEM TECHNICAL JOURNAL 



a O 5 10 15 20 25 30 35 40 45 50 55 60 65 70 



^ 



,U 5 10 15 20 25 30 35 4,0 45 50 55 oO dS 70 



X = Defectives in Universe 



iV = 300, n = im 



CHARTS A 



