Someone has at least three belts, all of his belt are white except two all of his belts are brown except two All of his belt are blue except two How many belts does he have

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