Suppose a coach puts the names of 20 of his Offensive players in a hat and selects two names. Likewise, he puts the names of his 20 Defensive players in a
different hat and selects one name. How many sets of three captains can he
choose?

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?