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+// Example 1.62. limiting error and standard deviation
+clc, clear
+// given :
+q1=50;
+q2=100;
+dq1=0.02; // may be +ve or -ve
+dq2=0.01; // may be +ve or-ve
+Le=(((q1/(q1+q2))*dq1)+((q2/(q1+q2))*dq2))*100;
+Re=sqrt(1+1); // when individul error are standard deviation,then errors in individual measurement are 2% of 50 and 1% of 100 ie., 1 and 1
+Sd=(Re/(q1+q2))*100;
+disp(Le,"limiting error,Le(%) = ")
+disp(Sd,"standard deviation,Sd(%) = ")