The average weekly number of toy planes produced by Factory J and K is 3463. The average weekly number of toy planes produced by Factory J and L is 6271. If Factory K produced ²₅ as many toy planes as Factory L each week, how many toy planes does Factory J produce weekly?
Total toy planes that Factory J and Factory K produced
= 3463 x 2
= 6926

Total toy planes that Factory J and Factory L produced
= 6271 x 2
= 12542

Number of toy planes produced by Factory K = 2 u
Number of toy planes produced by Factory L = 5 u

Factory J's toys + 2 u = 6926 --- (1)
Factory J's toys + 5 u = 12542 --- (2)

(2) - (1)
5 u - 2 u = 12542 - 6926
3 u = 5616
1 u = 5616 ÷ 3 = 1872

Number of toy planes produced by K
= 2 u
= 2 x 1872
= 3744

Number of toy planes produced by J
= 6926 - 3744
= 3182

Answer(s): 3182