Multiple Choice How many strings of length 12 over the alphabet {a,b,c} have exactly three a's...

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Question

Multiple Choice How many strings of length 12 over the alphabet {a,b,c} have exactly three as or have exactly three bs or h

Answer 1

Answer #1

The number of strings of length 12 over the alphabet {a, b, c} having exactly three as or having exactly three bs or having

Answer 2

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