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+//ex1
+//Calculating mass of eutetic in alloy
+clc
+M=1;//Mass of alloy given (in kg)
+P1=73;//Percentage of tin in alloy
+M=M*1000;//Mass of alloy given (in g)
+w1=(P1/100)*M;//Mass of tin in given alloy (in g)
+w2=M-w1;//Mass of lead in given alloy (in g)
+p1=64;//Percentage of tin in eutectic composition
+p2=100-p1;//Percentage of lead in eutectic composition
+w3=(w2*p1)/p2;//Mass of tin in eutectic corresponding to w2 of lead (in g)
+total=w2+w3;//Total mass of eutectic in alloy (in g)
+printf("Total mass of eutectic in alloy = %d g.",total);