How Many Permutations of the Seven Letters A, B, C

question 53

Short Answer

How many permutations of the seven letters A, B, C, D, E, F, G neither begin nor end with A?

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Definitions:

Selective Attention

The cognitive process of focusing on certain stimuli or information while ignoring others.

Cocktail Party Effect

The brain's ability to focus one's auditory attention on a particular stimulus while filtering out a range of other stimuli, as when one hears their name in a noisy room.

Driving

The act of controlling and operating a vehicle, typically an automobile, as a means of transportation from one location to another.

Inattentional Blindness

A psychological phenomenon whereby an individual fails to perceive an unexpected stimulus in plain sight, due to the focus of attention elsewhere.