Since Population A is considered as standard Population. So, compute CDR for population A and SDR for Population B.
SDR (A) = CDR(A) = \(\frac {\textit{No.of deaths occuring in the year}}{\textit{Average population in the year}} \times 1000\)
SDR (B) =\(\frac{∑PB}{∑P}\) B ASDR’s of Population B, P
= Standard Population of A. For Population A :
CDR(A) = \(\frac{585}{54000}\)= 10.83
For Population B

SDR (A) = \(\frac{569550}{54000}\)
= 10.547.