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5 couples couples want to have their pictures taken. in how many ways can they arrange themselves in a row

Sagot :

Zeshaid
1 couple = 2 persons
5 couple = 10 persons

a. if couple must stay together: Since there are 5 couples therefore, 5! x 2! = 240

b. if they may stand anywhere: 10! = 3, 628, 800

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