A: This is a logic and decision-making problem. Given the information, the farmer should strongly consider reducing the number of brown cows or separating and closely monitoring them, as they are disproportionately causing the majority of problems on the farm.

Here is a breakdown of the reasoning:

Problem Concentration: The brown cows, which represent only 15% of the total cow population, are responsible for 80% of all the farm's problems.

Disproportionate Impact: This high problem rate means the brown cows are inefficient and costly to the farm's operation compared to the rest of the herd.

Possible Action - Culling or Sale: The most direct and logical solution is to cull (slaughter for meat) or sell the majority of the brown cows. Removing the primary source of the problems (the 80%) would significantly improve overall farm efficiency and reduce costs, even though they only represent a small fraction of the total herd.

Possible Action - Investigation and Separation: Before a drastic measure like culling, the farmer could investigate what the specific problems are (e.g., disease, aggressive behavior, low milk/meat production) and separate the brown cows from the rest of the herd to prevent the problems from spreading. If the problems are solvable, a temporary separation and treatment might be an option. However, if the problems are inherent or chronic, reduction is the most practical long-term solution.

(http://www.autoadmit.com/thread.php?thread_id=5786913&forum_id=2#49353270)