Question 304546
1/2 cup of juice for each of 240 campers is 120 cups with the 
proportions 2 parts concentrate to 3 parts water for mix A.
Each cup contains {{{2/(2 + 3)) = 2/5}}} cups concentrate
and {{{3/(2 +3) = 3/5}}} cups water
for 120 cups:
{{{2/5 * 120 = 48}}} cups concentrate
and
{{{3/5 * 120 = 72}}} cups water
-------------------------
Mix B has 1 part concentrate to 4 parts water
each cup has {{{1/(1 + 4) = 1/5}}} cup concentrate and
{{{4/(1 + 4) = 4/5}}} cup water
For 120 cups that is
{{{1/5 * 120 = 24}}} cups concentrate
and
{{{4/5 * 120 = 96}}} cups water