I need help!! thank you so much <3

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

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?