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+//To Design the system to meet the given Equivalent System Reliability
+//Page 614
+clc;
+clear;
+
+//Individual System Reliabilities
+Ra=0.8;
+Rb=0.95;
+Rc=0.99;
+Rd=0.90;
+Re=0.65;
+
+//When All Are Connected in Series
+
+Req=Ra*Rb*Rc*Rd*Re; //Equivalent System Reliability
+
+Rr=0.8; //Required
+
+Rae=Rr/(Rb*Rc*Rd);
+
+//Since Connecting the elements in parallel will increase their reliability
+deff('x=rel(Ri,y,)','x=(1-((1-Ri)^y))') //Equal Only Parallel Combination
+
+//Since Connecting the elements in parallel will increase their reliability
+//Conditions to Find The Number of Elements to be used
+for i= 1:10
+    L=i; //Number of Time Element A is used
+    R1=rel(Ra,i);
+    X=R1-Rae;
+    if(abs(X)+X==0)
+        continue;
+    else
+        break;
+    end
+end
+
+for i= 1:10
+    M=i;//Number of Time Element E is used
+    R2=rel(Re,i);
+    X=R2-Rae;
+    if(abs(X)+X==0)
+        continue;
+    else
+        break;
+    end
+end
+
+printf('a) The Equivalent system Reliability is %g\n',Req)
+printf('b) One Each of B,C and D all connected in series are connected in series\nwith the series combination of X(Comination of %g elements of A, All Connected in Parallel)\nand Y(Comination of %g elements of E, All Connected in Parallel) to achieve \n%g Equivalent System Realibility\n',L,M,Rr)