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3. A person has to choose two-digits from 1, 2, 3 and 4 numbers to make
two digit number. How many different arrangements of the digits are
possible if repetition is allowed?​


Sagot :

Answer:

16 is the answer

to find the answer, solve it by using permutation then you'll be having 4P2 which is 4×3×2×1 / 2×1 = 12 and since repetition is allowed, add 4 to 12 and you'll get 16