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30 March, 19:38

Sally collects stuffed animals. She has 8 teddybears, 6 kittens, 6 bunnies, and 4 puppies. She decides to trade 1 of herteddy bears, 1 ofher bunnies and 1 of her puppies with herfriend Lyle. How many differentcombinations of these animals can she tradewith Lyle?

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  1. 30 March, 21:34
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    Since she has 8 Teddy bears, 6 kitten, 6 bunnies and 4 puppies and decide to trade 1 teddy bear, 1 bunny and 1 puppy and no traded kitten; the combination is given by

    8C1 * 6C0 * 6C1 * 4C1 = 8 * 1 * 6 * 4

    =192 ways
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