Question 18
Alloys A, B and C contain the following percentages of lead, tin and zinc, respectively: A: $(30,70,0)$; B: $(0,80,20)$; C: $(10,50,40)$. Terry mixes these alloys to obtain alloy T containing $15\%$ lead. If $m,n$ are the maximum and minimum possible tin percentages, find $m-n$.
Allow a zero amount of one starting alloy; percentages refer to mass and mixing preserves mass.
Enter the exact number only; fractions are allowed.
Allow a zero amount of one starting alloy; percentages refer to mass and mixing preserves mass.
Enter the exact number only; fractions are allowed.