A company plans to gradually replace its fleet of 20 cars with newer models. At the end of every year starting with 2000 it retires 5 of its old cars and buys 6 new models.How many years did it take before the number of older cars left in the company's fleet was less than 50 percent of the fleet?
Answers
A) 6
B) 3
C) 2
D) 4
E) 5
Total fleet--20   End of year 2000 -- (retires 5 and buys 6) total fleet--21(15 old 6 new).   End of year 2001 -- (retires 5 and buys 6) total fleet--22(10 old 12 new).   Answer is 2--after 2 years the company has a total of 22 cars (10 old 12 new), the old cars are already less than 50% of its fleet.
<result>C</result>
A company plans to gradually replace its fleet of 20 cars with newer models. At the end of every year starting with 2000 it retires 5 of its old cars and buys 6 new models.How many years did it take before the number of older cars left in the company's fleet was less than 50 percent of the fleet?