Anna has 10 marbles: 5 red, 2 blue, 2 green and 1 yellow. she wants to arrange all of them in a row so that no two adjacent marbles are of the same color and the first and the last marbles are of different colours. how many different arrangements are possible?
a) 30
b) 60
c) 120
d) 240
e) 480

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