Please help I can't for the life of me figure out what I'm doing wrong with this question. A bag contains 7 red marbles, 10 white marbles, and 10 blue marbles. You draw 3 marbles out at random, without replacement. What is the probability that all the marbles are red?

The probability that all the marbles are red is ___%.

What is the probability that exactly two of the marbles are red?
The probability that exactly two of the marbles are red is
%.

What is the probability that none of the marbles are red?
The probability of picking no red marbles is %.

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0