Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test Mathematics Permutations and Combinations Fundamental Principles of Counting
The number of 5 digit telephone numbers having at least one of their digits repeated is
1
9000
2
10000
3
30240
4
69760
5
None of the above