The risk of HIV+ mothers transferring HIV to their babies during pregnancy is estimated to be1 in 4. Suppose a researcher plans to take a random sample of HIV+ pregnant women and monitor the transfer of HIV.

using binomial

1. If 10 HIV+ pregnant women are randomly sampled, what is the probability that 2 or 3 will transfer HIV to their babies? (Answer correct to 3 decimal places)

2.. If10 HIV+ pregnant women are randomly sampled, what is the probability that5 ormorewill transfer HIV to their babies? (Answer correct to 3 decimal places)

3. If30 HIV+ pregnant women are randomly sampled, what is the probability that10 orless will transfer HIV to their babies?