The population of a country doubled every 10 years from 1960 to 1990. What was the percent increase in population during this time?

1. The population of a country doubled every 10 years from 1960 to 1990. What was the percent increase in population during this time?

[BKB Senior Officer-2012 : 2012]

1. 200%

2. 300%

3. 700%

4. 800%

Answer

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