Solve ques 3
Q.3. 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
(D) 9
Solve ques 3
Q.3. 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
(D) 9