How many distinct arrangements of the letters in “FINANCE” are possible? (N appears twice; other letters are distinct.)
Aptitude
Permutation and Combination
Difficulty: Easy
Choose an option
-
A2520
-
B1260
-
C5040
-
D840
Answer
Correct Answer: 2520
Explanation
Introduction / Context:Again a multiset permutation: 7 letters with a duplication of N. The standard formula applies.
Given Data / Assumptions:
- Letters: F, I, N, A, N, C, E (N × 2).
Concept / Approach:7! / 2! counts distinct arrangements since interchanging the two N’s does not create a new word.
Step-by-Step Solution:
7! / 2! = 5040 / 2 = 2520.Verification / Alternative check:Check multiplicities: only N repeats; no other repeated letters.
Why Other Options Are Wrong:5040 ignores repetition; 1260 or 840 divide by too much.
Common Pitfalls:Misidentifying repeat counts in the word.
Final Answer:2520