jee-advanced 1998 Q32

jee-advanced · India Permutations & Arrangements Forming Numbers with Digit Constraints

32. An $n$-digit number is a positive number with exactly $n$ digits. Nine hundred distinct $n$ digit numbers are to be formed using only the three digits 2,5 and 7 . The smallest value of n for which this is possible is:
(A) 6
(B) 7
(C) 8
(D) 9

32. An $n$-digit number is a positive number with exactly $n$ digits. Nine hundred distinct $n$ digit numbers are to be formed using only the three digits 2,5 and 7 . The smallest value of n for which this is possible is:\\
(A) 6\\
(B) 7\\
(C) 8\\
(D) 9\\

Paper Questions

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