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Hi Marcus, The number of ways of choosing 6 objects from 42 objects is called 42 choose 6 and is written by mathematicians as but sometimes you see it designated 42C6. The definition is where k! = k × (k-1) × (k-2) × (k-3) × ··· × 1. (For example 5! = 5 × 4 × 3 × 2 × 1 = 120.) Thus After some simplification this becomes I'll let you do the arithmetic. Penny | ||||||||||||
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