John.s car dealership contains m cars, 20% of which are minivans and 80% are sedans. Kevin's car dealership contains n cars, 40% of which are minivans are 60% are trucks. Larry's car dealership contains p cars, 50% of which are minivans and 50% of which are convertibles. If 25% of the m + n + p cars contained at the three dealerships are minivans, what is m in terms of n and p?
Answers.
A) n + 3p
B) 3n + 5p
C) 4n + 5p
D) (n+5p)/2
E) (4n+5p)/3
For this question algebraic ways is the easiest: 0.2m+0.4n+0.5p=0.25(m+n+p)--&gt; m=3n+5p   Answer: 3n + 5p.
<result>B</result>
John.s car dealership contains m cars, 20% of which are minivans and 80% are sedans. Kevin's car dealership contains n cars, 40% of which are minivans are 60% are trucks. Larry's car dealership contains p cars, 50% of which are minivans and 50% of which are convertibles. If 25% of the m + n + p cars contained at the three dealerships are minivans, what is m in terms of n and p?