Cristiana has 3 sons and a daughter. What is the probability of the 5th child to be a son?

Q. If a couple has three daughters, what are the chances that the fourth child will be a son?

Q. A family has five girls and no son, the probability of the occurance of son in 6${}^{th}$ child is

Q. A family has five girls and no son. Probability of son as the 6th child will be:

Q. A normal vision female whose father is colour-blind marries a normal vision male. What would be the probability of her sons and daughters to be color blind?