Aand b are two events. let p(a)=0.5 , p(b)=0.9 and p(a and b)=0.15 . which statement is true? a and b are independent events because p(a|b)=p(b) and p(b|a)=p(a) . a and b are not independent events because p(a|b)=p(a) and p(b|a)=p(b) . a and b are not independent events because p(a|b)≠p(a) . a and b are not independent events because p(a|b)=p(b) and p(b|a)=p(a) .

Based upon past experience, barry expects no overdrafts. he expects no 2nd copies of statements. barry estimates that he will use network atms about 5 times a month with either bank. barry decides in the end to choose eecu. assuming that both banks provide the necessary services equally well, and based upon the tables of fees given above, how much can barry reasonably expect to save annually by choosing eecu in this case over e-town bank? a. $72 b. $78 c. $144 d. $24

Plz. yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?