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I gave a multiple choice test to 100 students which consited of 10 questions. I let...

I gave a multiple choice test to 100 students which consited of 10 questions. I let the variable x be the number of correct answers on the test and f be the number of students who got that number correct. Find the mean and interpret the mean.

1. A woman has had two children. assume the probability of having a boy or a girl is 1/2.

Find the sample space for the gender of the two childreb.

What is the probability the woman had at least one girl?

If the first born was a boy, what is the probability the second born was a girl?

Math   Statistics-And-Probability   
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