Hello all, I missed a few days in my statistics class, and I need help with some homework, the question is as follows:
According to the current population survey, the following table summarizes probabilities for randomly selecting a full-time student in various age groups:
Age 15-17 18-24 25-34 35 or older
Probability 0.007 0.573 0.260 0.160
Question: If we randomly select a full time student, what is the probability that he/she is 25 or older?
Second question: If we randomly select a full time student, what is the probability that he/she is NOT 18-24 years old?
I would appreciate solutions, and/or the steps that must be taken to find them.
Re: Probability Models
This is not a tutorial service. Therefore, do not ask for a step-by-step solution. You can pay a tutor for that. We are free.
Originally Posted by arrogantandy
Now you need to show some effort,
For a) there are two numbers to add for at least 25. What is the sum?