Answer: B

Explanation:

The correct answer is B (0.50). Here’s how we arrive at this solution:

1. First, we need to convert both rates to the same time unit. Let’s convert them to customers per hour. Arrival rate: 5 customers in 15 minutes = (5 * 60) / 15 = 20 customers per hour Service rate: 8 customers in 12 minutes = (8 * 60) / 12 = 40 customers per hour
2. The traffic intensity (ρ) is calculated as: ρ = arrival rate / service rate
3. Substituting our values: ρ = 20 / 40 = 0.5

Therefore, the traffic intensity or utilization factor is 0.50 or 50%.