Final answer:
The heuristic approach is not a quantitative technique to problem solving.
Step-by-step explanation:
In problem solving, the quantitative techniques involve the use of numbers and mathematical calculations to analyze and solve problems. Therefore, options A (Linear programming), B (Queuing techniques), and C (Statistical techniques) are all quantitative techniques.
The heuristic approach, on the other hand, is a non-quantitative technique. It involves using mental shortcuts or general problem-solving frameworks to find solutions. Heuristics rely on intuition and experience rather than quantitative data.
So, the answer is option E, which states that 'All of the choices are quantitative approaches' is not correct because the heuristic approach is not a quantitative technique to problem solving.