defence exam Army Havildar SAC Mock Test Series 2025 Mathematics Permutations and Combinations Word Problems
The number of seven digit integers, with sum of the digits equal to \(10\) and formed by using the digits \(1, 2\) and \(3\) only, is
1
\(55\)
2
\(66\)
3
\(77\)
4
\(88\)