Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Permutations and Combinations Fundamental Principles of Counting
Consider the digits 3, 5, 7, 9. What is the number of 5-digit numbers formed by these digits in which each of these four digits appears?
1
240
2
180
3
120
4
More than one of the above
5
None of the above