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Subjects
Class 11MathematicsPermutations and CombinationsPermutationsHard
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In how many ways can (6) identical white balls and (4) identical black balls be arranged in a row if no two black balls are adjacent?

Answer and explanation

Correct answer: (35)

Place the (6) white balls first, creating (7) gaps, and choose (4) of them for black balls. With identical objects, only position selection is needed.

Related tags

PermutationsIdentical ObjectsGap MethodPermutations And CombinationsMathematicsClass 11 Mcq
सुधार सुझाएँ / Earn

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  5. 5Three distinct prizes are to be awarded to seven students. No student can receive more than one prize. How many ways are possible?
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  7. 7What is the value of \(\frac{21!}{19!\cdot2!}-\frac{18!}{16!\cdot2!}\)?
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  9. 9What is the value of \(\frac{22!}{20!\cdot 2!}-\frac{21!}{20!}\)?
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