Sarah jolly and betty are female triplets they and their 10


Sarah, Jolly and Betty are female triplets. They and their 10 cousins are posing for a series of photographs. One pose involves all 13 children. How many ways can the 7 boys and 6 girls be arranged in one row under each of the following conditions?

a) The boys and girls must alternate positions.

b) The triplets must stand next to each other.

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Algebra: Sarah jolly and betty are female triplets they and their 10
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