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diff --git a/1574/CH2/EX2.8/SCS_ex_2_8.sce b/1574/CH2/EX2.8/SCS_ex_2_8.sce
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+clc;
+// Chapter 2 Switched communication systems
+//Example 2.8,page no 129
+//given
+S=1000//no of subscribers
+T=2.4/60//avarage duration of calls in hours
+A=60//rate of traffic flow
+C=A/T//Tatol no of call in busy hour
+mprintf('Total no of call in busy hour is:%f calls per Hour\n',C)
+CR=C/S//busy hour calling rate
+mprintf('Busy hour calling rate is:%f \n',CR)
+SCL=30//no of call lost per hour
+
+B=SCL/(C+SCL)//grade of service
+mprintf('grade of service is: %f',B)