Boys Girls
Total
Beginner
0.15
0.1
0.25
Intermediate
0.2
0.35
0.55
Advanced
0.05
0.15
0.2
Total
0.4
0.6
1.0
Which statement is true?
O A. 60% of her students are girls.
O B. 10% of her students are in the beginner class.
OC. 15% of her students are boys.
OD. 35% of her students are in the intermediate class.

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