How Many Four-Digit Numbers Can Be Formed from the Digits

question 140

Multiple Choice

How many four-digit numbers can be formed from the digits 1, 3, 5, 7, 8, and 9 if the numbers mast be even and digits are not repeated? (Hint: Begin with the digit where there is a restriction on the choices.) ​

• A)120
• B)60
• C)360
• D)4,096
• E)10

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Definitions:

Hertz

A unit of frequency in the International System of Units (SI), symbolized as Hz, representing one cycle per second.

Frequency

The frequency at which an event happens within a specific time frame or sample size.

Pitch

The quality of a sound determined by the frequency of the sound waves, which translates to the highness or lowness of a tone.

Oscilloscope

An electronic test instrument that graphically displays varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time.