Question

If an average of 12 customers are served per hour, then one customer arrives every ________.

Answer 1

Assuming an average of 12 customers are served per hour, then a new customer arrives on average once every 5 minutes.

Answer 2

Answer:

The correct answer is:  5 minutes.

Explanation:

The average customer arrival should be calculated dividing the timeframe when those customers are served with the number of customers served. According to the example:

• Number of customers served per hour: 12
• 1 hour = 60 minutes

Thus,

• Average of customer’s arrival: 60 / 12 = 5 minutes