Mathematics, 16.06.2021 23:40 marlesly87

How many different codes of 6 digits are possible if the first digit must be 3, 4, 5, or 6 and if the code may not end in 0? Hint: think of positions.

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How many different codes of 6 digits are possible if the first digit must be 3, 4, 5, or 6 and if th...