In how many different ways can the letters of the word 'LEADING' be arranged so that the vowels always come together?
Aptitude
Permutation and Combination
Difficulty: Medium
Choose an option
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A720
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B360
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C840
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D1200
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ENone of these
Answer
Correct Answer: 720
Explanation
Problem restatementCount arrangements of 'LEADING' where the vowels form one adjacent block.
Given data
- Word: L, E, A, D, I, N, G (7 distinct letters).
- Vowels: E, A, I (3 vowels).
- Consonants: L, D, N, G (4 consonants).
Concept/ApproachBlock the vowels as [V]; arrange [V] with the 4 consonants (5 items), then permute vowels inside [V].
Step-by-step calculation Arrange 5 items: 5! = 120 Permute vowels (E, A, I): 3! = 6 Total arrangements = 120 × 6 = 720
Verification/AlternativeAll letters are distinct; no division by factorials for repeats is needed.
Final Answer720