#### Answer

The standard divisor is 50.05.

#### Work Step by Step

We can find the total patient load.
total load = 275 + 392 + 611 + 724 = 2002
We can find the standard divisor.
$standard~divisor = \frac{total~load}{number~of~ doctors}$
$standard~divisor = \frac{2002}{40}$
$standard~divisor = 50.05$
The standard divisor is 50.05