From the set { 1, 2, 3, 4, 5 } Which values make the ine?quality n + 1 → 4 true​

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?

Which geometric principle is used to justify the construction below?

Can someone me with this? i’m not sure what to put for my equations.