The test score of a physics class with 160 students is distributed normally with a mean of 75 and standard deviation of 7. what percentage of the class has a test score between 68 and 82 Approximately how many students have a test  score between 61 and 89? What is the probability that a student chosen at random has a test score between 54 and 75? Approximately how many students have a test score greater than or equal 96?

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The test score of a physics class with 160 students is distributed normally with a mean of 75 and standard deviation of 7.

  1. what percentage of the class has a test score between 68 and 82
  2. Approximately how many students have a test  score between 61 and 89?
  3. What is the probability that a student chosen at random has a test score between 54 and 75?
  4. Approximately how many students have a test score greater than or equal 96?

 

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