Question: State how many ways can 8 persons be seated in a row of 8 seats if (a) there are no restrictions on the seating arrangement

State how many ways can 8 persons be seated in a row of 8 seats if

(a) there are no restrictions on the seating arrangement

(b) person A must sit next to person B, but there are no restrictions on the remaining six persons

(c) there are four men and four women, and no two men (or two women)

can sit next to each other

(d) there are four married couples, and each couple must sit together.

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