The average weekly number of toy cars produced by Factory R and S is 3278. The average weekly number of toy cars produced by Factory R and T is 6428. If Factory S produced ²₇ as many toy cars as Factory T each week, how many toy cars does Factory R produce weekly?
Total toy cars that Factory R and Factory S produced
= 3278 x 2
= 6556

Total toy cars that Factory R and Factory T produced
= 6428 x 2
= 12856

Number of toy cars produced by Factory S = 2 u
Number of toy cars produced by Factory T = 7 u

Factory R's toys + 2 u = 6556 --- (1)
Factory R's toys + 7 u = 12856 --- (2)

(2) - (1)
7 u - 2 u = 12856 - 6556
5 u = 6300
1 u = 6300 ÷ 5 = 1260

Number of toy cars produced by S
= 2 u
= 2 x 1260
= 2520

Number of toy cars produced by R
= 6556 - 2520
= 4036

Answer(s): 4036