In a class of 20, find the probability that you and your best friend ( you only have 1 in the class) will be chosen to represent your class at a student conference

Probability = Number of favourable outcomes / Total Number of Outcomes

Favourable outcomes = 1 ( myself and my friend )

Total outcomes = 20C2

Probability = 1 / 20C2 = 1 / 190.........................................Answer

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