if two digit number are formed using the digit 1 2 3 4 without repeating them then find n (s)
Answers
Answered by
5
We can use permutation here
n = 4
nPr = 4P2
= 4! / 2!
= 4 ×3 × 2 / 2
= 12
12, 21
23,32
34,43
13,31
24,42
14,41
That's all possible cases.
Similar questions