1. Tardigrade
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  4. A telegraph has ' m ' arms and each arm is capable of ' n ' distinct positions including the position of rest. The total number of signals that can be made is :

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Q. A telegraph has ' $m$ ' arms and each arm is capable of ' $n$ ' distinct positions including the position of rest. The total number of signals that can be made is :

Permutations and Combinations

Solution:

Correct answer is (d) $ n^m-1$