Explore BrainMass
Share

Probability

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

Dear OTA,

Please help me with steps.

Thanks

A family has 4 children. The probability of having a boy is 50% (girl is the same 50%).
1) What is the probability that the family only has one boy?
2) What is the probability that the family only has three boys?
3) What is the probability that the family has at least one boy?
4) What is the probability that 4 children are girls?

Suppose that the probability that a person will develop hypertension over a lifetime is 20%.
5) What is the probability that 4 or 5 people develop hypertension over a lifetime among 20 students graduating from the same high school class?
6) What is the probability that exactly 3 people develop hypertension over a lifetime among 20 students graduating from the same high school class?
7) What is the probability that at least 2 people develop hypertension over a lifetime among 20 students graduating from the same high school class?

© BrainMass Inc. brainmass.com October 24, 2018, 10:11 pm ad1c9bdddf
https://brainmass.com/statistics/probability/probability-151242

Attachments

Solution Summary

The solution gives step by step procedure computing probability

$2.19
See Also This Related BrainMass Solution

The probability

A young engineer has invented holographic mobile phones and has approached a venture capital company to invest in it. The venture capital company considers the product to be an all or nothing product: either everyone will want one because everyone else has one or no one will want one because there will be no one to use it with. The company believes that the probability that it will take off netting them a profit of $2000000 is 0.14. If it doesn't take off then they expect that they would loose $200000. They are considering using a consumer survey to gather more information. However, the company has experience that shows that the probability that the consumer survey will predict success for a product that will fail is 0.24, and the probability that the consumer survey will predict failure when the product will be a success is 0.07. What is the monetary value of the information from a consumer survey to the venture capital company in this case? (ie what is the maximum that they should spend on a consumer survey)?

View Full Posting Details