The average weekly number of toy planes produced by Factory M and N is 3226. The average weekly number of toy planes produced by Factory M and P is 7144. If Factory N produced ²₅ as many toy planes as Factory P each week, how many toy planes does Factory M produce weekly?
Total toy planes that Factory M and Factory N produced
= 3226 x 2
= 6452

Total toy planes that Factory M and Factory P produced
= 7144 x 2
= 14288

Number of toy planes produced by Factory N = 2 u
Number of toy planes produced by Factory P = 5 u

Factory M's toys + 2 u = 6452 --- (1)
Factory M's toys + 5 u = 14288 --- (2)

(2) - (1)
5 u - 2 u = 14288 - 6452
3 u = 7836
1 u = 7836 ÷ 3 = 2612

Number of toy planes produced by N
= 2 u
= 2 x 2612
= 5224

Number of toy planes produced by M
= 6452 - 5224
= 1228

Answer(s): 1228