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A luxury car dealership sells only Ferraris and Lamborghinis. If the number of Ferraris for sale is 4/9 of the total number of cars for sale, then for every 4 Ferraris there are:
A. 2 Lamborghinis
B. 3 Lamborghinis
C. 4 Lamborghinis
D. 5 Lamborghinis
E. 9 Lamborghinis
A. 2 Lamborghinis
B. 3 Lamborghinis
C. 4 Lamborghinis
D. 5 Lamborghinis
E. 9 Lamborghinis
03 Nov 2018, 03:24
Kudos
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You mean \(\frac{4}{9}\)
In this case, if the number of cars is \(x\), the number of ferraris is \(\frac{4}{9}*x\)
If the number of ferraris is 4 then \(\frac{4}{9}*x=4\) means that \(x=9\)
So 9 cars in total, so 5 lambos.
Answer D
Hope it is clear.
In this case, if the number of cars is \(x\), the number of ferraris is \(\frac{4}{9}*x\)
If the number of ferraris is 4 then \(\frac{4}{9}*x=4\) means that \(x=9\)
So 9 cars in total, so 5 lambos.
Answer D
Hope it is clear.
04 Nov 2018, 18:00
Kudos
Bookmarks
Baten80
A luxury car dealership sells only Ferraris and Lamborghinis. If the number of Ferraris for sale is 4/9 of the total number of cars for sale, then for every 4 Ferraris there are:
A. 2 Lamborghinis
B. 3 Lamborghinis
C. 4 Lamborghinis
D. 5 Lamborghinis
E. 9 Lamborghinis
A. 2 Lamborghinis
B. 3 Lamborghinis
C. 4 Lamborghinis
D. 5 Lamborghinis
E. 9 Lamborghinis
We can create the equation:
F/(F + L) = 4/9
9F = 4F + 4L
5F = 4L
Alternate Solution:
Since the fraction of Ferraris for sale is 4/9 of the total, then the fraction of Lamborghinis for sale is 5/9 of the total. If we were to assume that there were 9 cars for sale, we would see that there were 4
Ferraris and 5 Lamborghinis, with a resulting ratio of 4 to 5.
Answer: D
