A couple decides to keep having children until they have a girl, at which point they will stop having children. They also agree to having a maximum of three children. The table below shows the probability
distribution of X = the number of children such a couple would have.
Binomia
1
2
3
X = # of children
P(X)
0.5
0.25 0.25
Given that pix = 1.75 children, find the standard deviation of the children such a couple would have.
Round your answer to two decimal places.