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Quantitative Aptitude

Fundamental Principle of Counting

How many perm...

Question

How many permutations of three different digits are there, chosen from the ten digits $0$ to $9$ inclusive?

A

84

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B

120

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C

900

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D

504

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Solution

The correct option is C $900$
$0$ to $9$ both inclusive
Number of digits $= 10$
Three digit number (Repetition allowed)
Total number of possible ways
$= 9 \times 10 \times 10 = 900$

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