a) 21530
b) 8! × 360
c) 8! × 480
d) 8! × 240
Answer: c
Explanation: Total no. of seats,
= 1 grandfather + 5 sons and daughters + 8 grandchildren= 14
The grandchildren can occupy the 4 seats on either side of the table in 4! = 24 ways.
The grandfather can occupy a seat in (5 – 1) = 4 ways (4 gaps between 5 sons and daughter).
And, the remaining seats can be occupied in 5! = 120 ways (5 seat for sons and daughter).
Hence total number of required ways, = 8! × 480
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