Question
Question: If all 5 digit nos. that can be formed using the digits 1, 2, 3, 4, 5 without repetition are arrange...
If all 5 digit nos. that can be formed using the digits 1, 2, 3, 4, 5 without repetition are arranged in ascending order, the rank of 31, 542 is
A
54
B
44
C
34
D
64
Answer
54
Explanation
Solution
1 → ∠42 → ∠4 312 → ∠2
314 → ∠23152 → ∠1 31542 → 1
48 + 4 + 2 = 54