In a work division of 45 employees 20 or male 30 of the employees are at least 40 years old and six of the females are less than 40 years of age referring to the above information how many males are at least 40 years of age

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample