The average weekly number of toy helicopters produced by Factory U and V is 3739. The average weekly number of toy helicopters produced by Factory U and W is 6304. If Factory V produced ⁴₇ as many toy helicopters as Factory W each week, how many toy helicopters does Factory U produce weekly?
Total toy helicopters that Factory U and Factory V produced
= 3739 x 2
= 7478

Total toy helicopters that Factory U and Factory W produced
= 6304 x 2
= 12608

Number of toy helicopters produced by Factory V = 4 u
Number of toy helicopters produced by Factory W = 7 u

Factory U's toys + 4 u = 7478 --- (1)
Factory U's toys + 7 u = 12608 --- (2)

(2) - (1)
7 u - 4 u = 12608 - 7478
3 u = 5130
1 u = 5130 ÷ 3 = 1710

Number of toy helicopters produced by V
= 4 u
= 4 x 1710
= 6840

Number of toy helicopters produced by U
= 7478 - 6840
= 638

Answer(s): 638