Refer to the following information on full-term births in the united states over a given period of time. type of birth number of births single birth 21,000,000 twins 500,000 triplets 5000 quadruplets 300 use this information to estimate the probabilities of the following events. (a) a randomly selected pregnant woman who reaches full term delivers twins. (give the answer to three significant figures.) (b) a randomly selected pregnant woman who reaches full term delivers quadruplets. (give the answer to three significant figures.) (c) a randomly selected pregnant woman who reaches full term gives birth to more than a single child. (give the answer to three significant figures.)