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+//Exa 2.9 
+// To find total traffic in Erlangs and no of MScs required to handle it.
+
+clc;
+clear all;
+
+Tpopu=200000;//Total population
+SP=0.25; //subscriber penetration
+HT1=100;  //holding time for Mobile to Land line and vicecersa
+c1=3;  //Avg calls/hr for Mobile to Land line and vicecersa
+HT2=80;  //For mobile to mobile
+c2=4;   //For mobile to mobile
+TMSC=1800;  //traffic one msc can hold
+TrafDist=0.9 //Traffic distribution for Mobile to Land line and vicecersa
+
+//solution
+aM_L=c1*HT1/3600;  //Traffic Generated by Subscriber (M-L and  L-M).
+aM_M=c2*HT2/3600;  //Traffic Generated by Subscriber (M-M).
+WlessSub=SP*Tpopu;  //total wireless subscribers
+TotalTraffic=WlessSub*TrafDist*aM_L+WlessSub*(1-TrafDist)*aM_M;
+MSCreqd=TotalTraffic/TMSC;
+if(MSCreqd-int(MSCreqd)>0)//for rounding of to next integer ef 2.33 to 3
+    MSCreqd=MSCreqd+1;
+     end
+printf('Total Traffic is %.1f Erlangs \n',TotalTraffic);
+printf(' NO of MSCs Required are %d \n',int(MSCreqd));