Question five-s
| Country | Land area (square kilometers) |
| Monaco | 2.0 |
| Nauru | 21 |
| San Marino | 61 |
| Tuvalu | 26 |
| Vatican City | 0.44 |
The table above shows the land area, in square kilometers, of the five smallest countries of the world in 2016. Based on the table, what is the mean land area of the 5 smallest countries in 2016, to the nearest square kilometer?
20
22
61
110
Five Smallest Countries in 2016 Country Land area (square kilometers) Monaco 2.0 Nauru 21 San Marino
Medium-difficulty · SAT Math · One-Variable Data & Statistics — Mean, median, mode, range. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice B is correct. The mean land area of these 5 countries is equal to the sum of the land areas of these countries, or 
, divided by the number of countries in the table, 5, or 
. Combining like terms in the numerator yields 
, which simplifies to 22.088 square kilometers. This value, when rounded to the nearest square kilometer, is 22.
Choice A is incorrect and may result from a calculation error. Choice C is incorrect. This is the greatest land area of the 5 countries in the table. Choice D is incorrect. This is the sum of the land areas of the 5 countries in the table, rounded to the nearest square kilometer.
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