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7 November, 16:14

A compact disc is designed to last an average of 4 years with a standard deviation of 0.8 years.

What is the probability that a CD will last less than 3 years?

1.11%

10.56%

86.65%

100%

+1
Answers (1)
  1. 7 November, 18:30
    0
    100% because 4 - 0.8 is 3.2

    = 3.2 years
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