Answer: [tex]3 \%[/tex]
Explanation:
The Rate of Natural Increase ([tex]RNI[/tex]), when there is no migration, is calculated by:
[tex]RNI=CBR-CDR[/tex]
Where:
[tex]CBR=\frac{40}{1000}[/tex] represents the Crude Birth Rates
[tex]CDR=\frac{10}{1000}[/tex] represents the Crude Death Rates
[tex]RNI=\frac{40}{1000}-\frac{10}{1000}[/tex]
[tex]RNI=\frac{3}{100}=3 \%[/tex]
Hence, this country has a RNI of [tex]3 \%[/tex]
