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

question 12

Multiple Choice

How many three-digit numbers can be formed under the following condition? ​
The leading digit cannot be zero.
​

• A)800
• B)​500
• C)​900
• D)​600
• E)​700

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Definitions:

Visual System

The part of the central nervous system that allows organisms to process visual detail, including the eyes, optic nerves, and brain regions involved in visual perception.

Wavelengths

The distance between consecutive crests of a wave, typically used in the context of electromagnetic and sound waves.

Auditory Receptors

are sensory cells located in the inner ear that convert sound waves into electrical signals, which are then interpreted by the brain as sound.

Cochlea

A snail-shaped, fluid-filled organ in the inner ear, containing the organ of Corti, where the receptors for hearing are located.