Book Maths Puzzle

A company has 10 software engineers and 6 civil engineers. In how many ways can they be seated in a round table so that no two of the civil engineers will sit together?

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Book Other Question

Kiran has 8 black balls and 8 white balls. In how many ways can he arrange these balls in a row so that balls of different colours are alternate? How many 8 digit mobile numbers can be formed if any digit can be repeated and 0 can also start the mobile number?