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+//Exa 2.5 
+//To find traffic intensity in Erlangs and CCS.
+//Refer-Table 2.1(page No 28): Traffic data used to estimate traffic intensity
+
+clc;
+clear all;
+
+time=90;  //in minutes
+calls=10;  //no of calls in 90mins
+
+//solution
+CR=calls/(time/60);    //call arrival rate in calls/hour
+tavg=(60+74+80+90+92+70+96+48+64+126)/10;    //average call holding time in sec per call
+I= CR*(tavg/3600);     //traffic intensity in Erlangs
+printf('Traffic Intensity is %.3f Erlangs = %.2f CCS \n ',I,I*36);