Am I correct? If not, what are the correct answers?

To the right are the outcomes that are possible when a couple has three children. Refer to that list, and find the probability of each event. 1st 2nd 3rd a. Among three children, there is exactly 1 girl. boy - boy - boy b. Among three children, there are exactly 2 boys. boy - boy - girl c. Among three children, there are exactly 3 girls. boy - girl - boy boy - girl - girl girl - boy - boy girl - boy - girl girl - girl - boy girl - girl - girl a. What is the probability of exactly 1 girl out of three children? (Type an integer or a simplified fraction.) b. What is the probability of exactly 2 boys out of three children? (Type an integer or a simplified fraction.) c. What is the probability of exactly 3 girls out of three children? (Type an integer or a simplified fraction.)