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The number of bottles of shampoo sold monthly by a certain discount drugstore is a normal random variable with mean 212 and standard deviation 40.

  1. The number of bottles of shampoo sold monthly by a certain discount drugstore is a normal random variable with mean 212 and standard deviation 40. Find the probability that next month's shampoo sales will be:


  1. Greater than 200
  2. Less than 250
  3. Greater than 205 but less than 225


Please help me with this question

Top Answer

Mean =212 and s=40 The z statistic is given as  z = ​ s ​ ​ x − μ ​ ​  a)  P ( x > 2 0 0 ) = P ( z... View the full answer

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