Answer: 21%
Explanation: The developer purchased 3 properties and he can buy each property for $20 per square foot.
Therefore: 75 × 110 =8250 square feet.
8250 × $20 = $165 000 per lot.
Each lot was sold for $200 000. Which means the developer made profits of:
$200 000 - $165 000 = $35 000 per lot.
The percentage of profit on each lot is:
Percentage of profit on cost amount:
= 
= 0.2121212 recurring × 100
= 21,21%
Percentage of profit on sale amount:
= 
= 0.175 × 100
= 17,5%
Answer:
Arithmetic = 3%
Geometric = 2.37%
Explanation:
The arithmetic average of 'n' returns is given by:

For five returns of 5% ,21%, -12%, 7%, and -6%:

The geometric average of 'n' returns is given by:
![G=\sqrt[n]{(1+r_1)*(1+r_2)*...*(1+r_n)}-1](https://tex.z-dn.net/?f=G%3D%5Csqrt%5Bn%5D%7B%281%2Br_1%29%2A%281%2Br_2%29%2A...%2A%281%2Br_n%29%7D-1)
For five returns of 5% ,21%, -12%, 7%, and -6%:
![G=\sqrt[5]{(1+0.05)*(1+0.21)*(1-0.12)*(1+0.07)*(1-0.06)}-1\\G=0.0237=2.37\%](https://tex.z-dn.net/?f=G%3D%5Csqrt%5B5%5D%7B%281%2B0.05%29%2A%281%2B0.21%29%2A%281-0.12%29%2A%281%2B0.07%29%2A%281-0.06%29%7D-1%5C%5CG%3D0.0237%3D2.37%5C%25)
Goods were able to be produced faster and more efficiently.
Answer:
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