Simplify using only positive exponents. (2p^2q^-3r)-3/(3p^-2q^3r^2) a.9^3/72p^2r^5 b. p^q^3/72r^5 c. q^3/72p^2r^6 d. q63r^5/72p^2

Can someone me and do the problem plz so i can understand it more better

Can someone me and plz do the problem

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?