Customers Arrive at the Local Grocery Store at a Steady

question 41

Multiple Choice

Customers arrive at the local grocery store at a steady rate of 40 an hour. Thirty percent of these customers purchase 10 items or less and go to the express line where they enjoy an average checkout time of 5 minutes. Customers that don't meet the express line criterion go to the other checkout line where they spend an average of 10 minutes checking out. How many people are checking out in the express line on average?

• A) 1.0
• B) 3.0
• C) 12
• D) 144

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Definitions:

Square Wave Voltage

An electrical signal that switches instantaneously between two levels, used for digital communication, characterized by its distinct, non-variable high and low states.

DC Average

The average value of a direct current (DC) over a period of time, often used to describe power or signal levels.

Positive Pulses

Electrical signals that transition from a lower to a higher voltage level, typically representing a binary '1' in digital circuits.

Speed Regulation

A comparison of a motor’s speed between no load and full load.