Total staff = 132. Doctors : Nurses = 2 : 9.<br><br>
[[model:questions/solutions/q10503.png]]<br><br>
Total units = 2 + 9 = 11 units<br>
&bull; 11 units → 132<br>
&bull; 1 unit → 132 ÷ 11 = 12<br>
&bull; Doctors = 2 units = 2 × 12 = 24<br>
&bull; Nurses = 9 units = 9 × 12 = 108<br><br>
Now find the target groups:<br>
Doctors &mdash; specialists : GP = 5 : 1, so GP = \( \frac{1}{6} \) × 24 = 4<br>
Nurses &mdash; registered : trainee = 7 : 2, so trainees = \( \frac{2}{9} \) × 108 = 24<br><br>
Total trainees or GPs = 4 + 24 = 28<br>
Check: Specialists = 20, registered nurses = 84. 20 + 4 + 84 + 24 = 132. ✓<br><br>
Final Answer: 28