The average weekly number of robots produced by Factory L and M is 3275. The average weekly number of robots produced by Factory L and N is 6329. If Factory M produced ²₅ as many robots as Factory N each week, how many robots does Factory L produce weekly?
Total robots that Factory L and Factory M produced
= 3275 x 2
= 6550

Total robots that Factory L and Factory N produced
= 6329 x 2
= 12658

Number of robots produced by Factory M = 2 u
Number of robots produced by Factory N = 5 u

Factory L's toys + 2 u = 6550 --- (1)
Factory L's toys + 5 u = 12658 --- (2)

(2) - (1)
5 u - 2 u = 12658 - 6550
3 u = 6108
1 u = 6108 ÷ 3 = 2036

Number of robots produced by M
= 2 u
= 2 x 2036
= 4072

Number of robots produced by L
= 6550 - 4072
= 2478

Answer(s): 2478