The average weight of 20 boxes of oranges is 2 kg, and the average weight of 30 boxes of mangoes is 3 kg. Find the average weight of these boxes of fruits, taken together.

2.6 kg

Sum of weight of 20 boxes of oranges = 20 × 2 = 40 kg

Sum of weight of 30 boxes of mangoes = 30 × 3 = 90 kg

Average weight of boxes of both fruits together = \(\frac{90 + 40 }{50}\) 

= \(\frac{130}{50}\)  = 2.6 kg