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Permutations & Combinations

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Permutations & Combinations  [#permalink]

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New post 10 Apr 2019, 16:17
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There are 4 red balls, numbered 1, 2, 3, 4. Similarly there are 3 numbered blue balls and 2 numbered yellow balls. In how many ways can these 9 balls be arranged in a row, if no two blue balls have to be together?
(A) 6! × 7P3 (B) 48 × 7P3 (C) 6! × 5P3 (D) 9! – 7!×3! (E) None of the above
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Re: Permutations & Combinations  [#permalink]

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New post 10 Apr 2019, 17:14
Hi nivikumar93,

When posting specific GMAT questions, you'll receive more of a response if you post them to their specific sub-forums. For example, the Problem Solving forum can be found here:

https://gmatclub.com/forum/quantitative-7/

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Re: Permutations & Combinations   [#permalink] 10 Apr 2019, 17:14
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