Question: Solve the problem by the Fundamental Counting Principle. How many differentfour-letter secret codes can be formed if the first letter must be an S or

Solve the problem by the Fundamental Counting Principle.

How many differentfour-letter secret codes can be formed if the first letter must be an S or aT? Repetition isallowed.)

A. 421824

B.

456,976

C.

35,152

D.

72

WHICH ONE THE ANSWER?

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