The Number of Phone Calls Coming into a Switchboard in the Next

question 5

Multiple Choice

The number of phone calls coming into a switchboard in the next five minutes will either be 0,1,or 2.The probabilities are the same for each of these (1/3) .If X is the number of calls arriving in a five-minute time period,what is the mean of X?

• A)1/3
• B)2/3
• C)1
• D)4/3
• E)None of the above

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Definitions:

Brain Abnormalities

Structural or functional deviations in the brain from the normal pattern, which can impact various aspects of cognition, emotion, and behavior.

Obsessive-compulsive Disorder

A mental disorder characterized by unwanted, recurring thoughts (obsessions) and repetitive behaviors (compulsions) that the individual feels driven to perform.

Alarm Signal

A warning sign or signal indicating imminent danger or the need to take action to avoid a threat.

Obsessive-compulsive Disorder (OCD)

A mental disorder characterized by recurrent, unwanted thoughts (obsessions) and/or repetitive behaviors (compulsions) that the individual feels driven to perform.