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2 May, 19:21

Teesha is in french club. there are 19 students in the club. The french teacher will pick two students at random to guide visiting students from France. What is the probability that Teesha will not be picked up as a guide.

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  1. 2 May, 21:05
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    To answer this we need to find the probability that teesha is not chosen for each pick, then multiply them together.

    For the first pick, there are 19 students in the class, so teesha has a 18/19 chance of not getting chosen. For the second pick, one student has been removed, so there is now only a 17/18 chance Teesha is not chosen.

    We now multiply the two probabilities together. 18/19 * 17/18 = 306/342

    Simplify and we get 153/171.
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