Jingle went to buy some fruits. He bought 5-kg bananas, and the unit price is $2.40 per kilogram; he also bought 4-kg pears and 11-kg oranges. The unit price of pears and oranges is $3.20 and 4.20 respectively. What is the average price of all fruits?
First, let's calculate the total cost for each type of fruit:
Bananas:
5 kg * $2.40/kg = $12
Pears:
4 kg * $3.20/kg = $12.80
Oranges:
11 kg * $4.20/kg = $46.20
Now, let's calculate the total cost for all fruits:
Total Cost = $12 + $12.80 + $46.20 = $71
Now, let's calculate the total weight of all fruits:
Total Weight = 5 kg + 4 kg + 11 kg = 20 kg
Now, let's calculate the average price of all fruits:
Average Price = Total Cost / Total Weight
Average Price = $71 / 20 kg = $3.55/kg
Therefore, the average price of all fruits is $3.55 per kilogram.