The average weekly number of toy planes produced by Factory K and L is 3278. The average weekly number of toy planes produced by Factory K and M is 6467. If Factory L produced ²₅ as many toy planes as Factory M each week, how many toy planes does Factory K produce weekly?
Total toy planes that Factory K and Factory L produced
= 3278 x 2
= 6556

Total toy planes that Factory K and Factory M produced
= 6467 x 2
= 12934

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

Factory K's toys + 2 u = 6556 --- (1)
Factory K's toys + 5 u = 12934 --- (2)

(2) - (1)
5 u - 2 u = 12934 - 6556
3 u = 6378
1 u = 6378 ÷ 3 = 2126

Number of toy planes produced by L
= 2 u
= 2 x 2126
= 4252

Number of toy planes produced by K
= 6556 - 4252
= 2304

Answer(s): 2304