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The life of a Radio Shack record player is normally distributed with a mean of 3...

The life of a Radio Shack record player is normally distributed with a mean of 3 years and a standard deviation of 0.7 years. Radio Shack guarantees its record players for 2 years.

(a) Find the probability that a record player will last less than 2 years? %

(b) Find the probability that a record player will last more than 4 years? %

math   Statistics-And-Probability   
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