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14 November, 17:07

At a track meet, 50 people ran the 100-meter dash. 2 people finished in 11 seconds, 5 people finished in 12 seconds, 8 people finished in 13 seconds, 10 people finished in 14 seconds, 21 people finished in 15 seconds, 2 people finished in 16 seconds, and 2 people finished in 17 seconds. What is the probability distribution for the finish times?

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  1. 14 November, 17:46
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    You have to do a histogram here:

    11 sec: 2 people: probability is 2/50 = 1/25 = 0.04

    12 sec: 5 people: probability is 5/50 = 1/10 = 0.1

    13 sec: 8 people: probability is 8/50 = 4/25 = 0.16

    14 sec: 10 people: probability is 10/50 = 1/5 = 0.2

    15 sec: 21 people: probability is 21/50 = 2.38

    16 sec: 2 people: probability is 2/50 = 1/25 = 0.04

    17 sec: 2 people: probability is 2/50 = 1/25 = 0.04
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