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Mr and Mrs Smith had invited 9 of their friend and their spouses for party at wiki beach resort. The stand for group...
Solution
Number of guests = 2(9) =18Number of members to be photographed = 18 + 2 = 20The number of ways in which all the 20 members can be arranged = 20! Case1: Mr and Mrs Smith are photographed together.Both of them are grouped together, that is count them as 1.Hence now the total number of members to be...
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