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: Permutations and Combinations (Mathematics) Question | DivineJEE

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: Permutations and Combinations (Mathematics) Question | DivineJEE | divineJEE