Answer:
45
Explanation:
In a barter economy, to know the price when multiple goods are involved, we use the following formula:
Prices = n(n-1) ÷ 2
Where
n = number of goods.
Now, given that
n = 10 goods,
Therefore,
Prices = 10(10-1) ÷ 2
= 10(9) ÷ 2
= 90 ÷ 2
= 45
Hence, the price one needs to know in order to exchange 10 goods in a barter economy is 45.