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How Many Four-Digit Numbers Can Be Formed Under the Following

question 25

Multiple Choice

How many four-digit numbers can be formed under the following condition? ​
The leading digit cannot be zero and the number must be less than 7,000.


Definitions:

Racing Heart Rate

A rapid heartbeat, often exceeding the normal range for adults, which can be caused by physical exertion, stress, anxiety, or medical conditions.

General Anxiety Disorder

A mental health disorder characterized by persistent and excessive worry about various aspects of daily life, not linked to any specific cause.

Disruptive Sleep

Interruptions in the normal sleep cycle that can negatively affect health and well-being.

Diagnosed Depression

A medical condition characterized by pervasive feelings of sadness, hopelessness, and a lack of interest or pleasure in activities, diagnosed by a healthcare professional.

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