In how many ways can 11 persons be arranged in a row such that 3
particular persons should always be together?
A. 91*31
B. 9!" 11
C. 10121
D. 111
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Answer:
answer is = 9! × 3!
Step-by-step explanation:
9! × 3!
(9×9×7×6×5×4×3×2×1) × (3×2×1)
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