Assume the student body of a large university (with over 10,000 students) is 55% female, 45% male. Fifteen students are selected randomly. Let X represent the number of females in the sample. (4 pts) Find the mean, variance, and standard deviation of X.

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

The width of a piece of rectangular land is 5m shorter rhan 1/3 of its length .find the width of the land if the length is 60m,150m.