The average weekly number of toy helicopters produced by Factory K and L is 3744. The average weekly number of toy helicopters produced by Factory K and M is 6828. If Factory L produced ²₅ as many toy helicopters as Factory M each week, how many toy helicopters does Factory K produce weekly?
Total toy helicopters that Factory K and Factory L produced
= 3744 x 2
= 7488

Total toy helicopters that Factory K and Factory M produced
= 6828 x 2
= 13656

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

Factory K's toys + 2 u = 7488 --- (1)
Factory K's toys + 5 u = 13656 --- (2)

(2) - (1)
5 u - 2 u = 13656 - 7488
3 u = 6168
1 u = 6168 ÷ 3 = 2056

Number of toy helicopters produced by L
= 2 u
= 2 x 2056
= 4112

Number of toy helicopters produced by K
= 7488 - 4112
= 3376

Answer(s): 3376