[" 32.n-digit numbers are formed using only three digits "2,5],[" and "7" .The smallest value of "n" for which "900" such distinct "],[" numbers can be formed,is : "],[[" (a) "6," (b) "7],[" (c) "8," (b) "]]

An n-digit number is a positive number with exactly n 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

An n-digit number is a positive number with exactly n 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

An n-digit number is a positive number with exactly n 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

nine hundred distinct ndigit numbers are to be formed using only the three digit 2,5,7 .the smallest value of n for which is possible

An n-digit number is a positive number with exactly n digit 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

Number of 5-digit numbers can be formed using the digits 2,4,7,9,0 if no digit is repeated :

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

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