1.100 people where sampled and their heights were recorded, it was discovered the mean height was 5 feet and 6.3 inches with a standard deviation of 3.75 inches.What is the probability of someone being shorter than 5 feet and 1.5 inches tall?

Hint: Normal distribution with mean=5 feet and 6.3 inches and standard deviation of 3.75. Please see lecture 5.3 example of hours people spend on cell phone.

2.The experiment is randomly drawing 3 marbles from a bag with replacement.

The bag contains, 10 green marbles, 8 red marbles, and 5 blue marbles

X = the number of marbles that are red

what is the expected number of red marbles?