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20 February, 02:57

Average = 55 seconds

1st number = 54.3 seconds

2nd number = 56.1 seconds

3rd number = n

What does "n" equal?

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Answers (1)
  1. 20 February, 06:05
    0
    (54.3+56.1+n) / 3 = 55

    54.3+56.1+n = 165

    54.6 = n
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