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4 Unit A2 2: Applied Mathematics (A-level only)

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Question 36

The lifetime of a certain type of battery is normally distributed with a mean of 60 hours. Given that 8% of the batteries last less than 48 hours, find the standard deviation of the lifetimes.

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4 Unit A2 2: Applied Mathematics (A-level only) Questions

  1. A Level
  2. /Maths
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