The average weekly number of toy cars produced by Factory Z and A is 3341. The average weekly number of toy cars produced by Factory Z and B is 6791. If Factory A produced ⁴₉ as many toy cars as Factory B each week, how many toy cars does Factory Z produce weekly?
Total toy cars that Factory Z and Factory A produced
= 3341 x 2
= 6682

Total toy cars that Factory Z and Factory B produced
= 6791 x 2
= 13582

Number of toy cars produced by Factory A = 4 u
Number of toy cars produced by Factory B = 9 u

Factory Z's toys + 4 u = 6682 --- (1)
Factory Z's toys + 9 u = 13582 --- (2)

(2) - (1)
9 u - 4 u = 13582 - 6682
5 u = 6900
1 u = 6900 ÷ 5 = 1380

Number of toy cars produced by A
= 4 u
= 4 x 1380
= 5520

Number of toy cars produced by Z
= 6682 - 5520
= 1162

Answer(s): 1162