GRE Permutation 2 questions - Rearranging boys girls; Rearranging white balls, black balls

Описание к видео GRE Permutation 2 questions - Rearranging boys girls; Rearranging white balls, black balls

Video solution to 2 questions that were posted as part of solution to Q5 of Wizako's Permutation Probability Chapter Test.

These 2 questions are to be solved using the same approach as we used for Q5.

Question 1
In how many ways can 3 boys and 3 girls be made to stand in a line such that no two boys stand together?

Question 2
In how many ways can 10 balls, 4 which are black and identical and 6 of which are white and identical be arranged in a line such that no two black balls are placed next to each other?

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