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## Homework Statement

Suppose that a married couple in Canada decide to have babies until they get the first girl baby. It is well-known that in high-latitude countries, the chance of have a girl is slightly higher than the chance of having boy. Suppose that the chance of having a girl in Canada is 0.52. Let R be the ratio of boys to girls in the second generation for this family.

a) Find the mean and variance of R

b) What is the chance that there are more than 2 boy babies in the family?

## Homework Equations

## The Attempt at a Solution

a) So the mean is E(X) of some random variable X. But R is a ratio. R is 48:52. How would R have a range if it is a ratio?

b) Need to have 3 or more boys. So first 3 need to be boys: (48/100)^3

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