Probability calculation
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1. A class has 10 business majors and 15 econ majors. If Five students are chosen at random, what is the probability that three are business major and two are econ majors?
2. The average time it take to travel from here to three is 30 minutes. The standard deviation is 5 minutes. About 68% of trips take within what range of time?
3. Test 1-4 are weighted differently. Calculate the average test score using the data below
Test Weight score
1 20% 60
2 20% 80
3 20% 70
4 40% 90
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Solution Summary
This solution gives the step by step method for computing probabilities based on Z score.
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Statistics: Need help solve these problem
1. A class has 10 business majors and 15 econ majors. If Five students are chosen at random, what is the probability that three are business major and two are econ majors?
Answer
Total number of students in the group =25
Number of ...
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