Nine hundred distinct n digit numbers are to be formed using only | Filo
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Class 11



Permutations and Combinations

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Nine hundred distinct digit numbers are to be formed using only the three digits and . the smallest value of for which this is possible is

Correct Answer: Option(c)
Solution: Using 2,5 and 7 with repetition, each place of n digits number can be chosen in 3 ways. So total of n digit number is equal to 
According to the question, 
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