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There are 12 girls and 10 boys in Mrs. Jones’ Kindergarten class. How many ways can she choose a line leader and a caboose each day?
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There are 12 girls and 10 boys in Mrs. Jones’ Kindergarten class. How many ways can she choose a line leader and a caboose each day?

User Alexey Semenyuk
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Start with the boys. When the line leader is chosen, there are 10 choices. Then out of the remaining 9, one is chosen to be the caboose. For the girls, the numbers would be 12 and 11. Multiply these numbers to get 1180 possibilities.
User Bwakabats
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