Question 752938: Student Scores:
53, 57, 59, 60, 60, 60, 61, 61, 62, 62, 62, 62, 63, 63, 65, 65, 65, 66, 67, 67, 68, 68, 68, 69, 71, 71, 71, 72, 72, 73, 73, 73, 73, 74, 74, 74, 75, 75, 75, 75, 75, 75, 75, 76, 76, 76, 76, 77, 77, 78, 78, 78, 78, 78, 79, 79, 79, 80, 81, 82, 82, 83, 84, 85, 85, 85, 86, 87, 88, 88, 88, 89, 90, 93, 93, 94, 95, 95, 96, 97
If the passing score is 70 points and 5 students are picked at random, find the probability that:
a) all 5 fail
b) only 2 fail
c) only 2 pass
d) all 5 pass
e)their score is between 90 and 95 points
Answer by Edwin McCravy(20055)   (Show Source):
You can put this solution on YOUR website!
Student Scores:
53, 57, 59, 60, 60, 60, 61, 61, 62, 62, 62, 62, 63, 63, 65, 65, 65, 66, 67, 67,
68, 68, 68, 69, 71, 71, 71, 72, 72, 73, 73, 73, 73, 74, 74, 74, 75, 75, 75, 75,
75, 75, 75, 76, 76, 76, 76, 77, 77, 78, 78, 78, 78, 78, 79, 79, 79, 80, 81, 82,
82, 83, 84, 85, 85, 85, 86, 87, 88, 88, 88, 89, 90, 93, 93, 94, 95, 95, 96, 97
If the passing score is 70 points and 5 students are picked at random, find the probability that:
If I counted right, then there are 80 students, 24 fail and 56 pass,
and 6 are between 90 and 95. I colored the failures red, and the
ones between 90 and 95 green.
a) all 5 fail
   = 0.0017680521
b) only 2 fail
  =  = 0.3182493722
c) only 2 pass
  =  = 0.1296571516
d) all 5 pass
  = 0.1588940706
e)their score is between 90 and 95 points
  = 0.0000002495838605
Edwin
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