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3n articles can be divided in to 3 equal groups in 280 ways then n=.......

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Maths Tutor

n=3
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Mathematics Expert for CBSE NTSE NSO IIT-JEE preparation

3 equal group means each article is having n articles So total ways is 3n!/(((n!)^3)*3!) (3! in denominator is for equal groups.) This is given to be 280. Just solve it to get n=3
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n=3
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Are some of these articles identical?
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