some problems

[yvram]

Hi everyone, Can somebody help me with these problems, please. I have been studying and I don't know how to resolve it.......
Thanks in advance

Here are the problems:

A square dart board has four dark circular regions of radius 3 inches as shown in the design above. Each point on the dart board is equally likely to be hit by a dart that hits the board. What is the probability that a dart that hits the board will his one of the circular regions? the length of the side of the square is24 in

(A) π/16

(B) π/48

(C) π/64

(D) 1/3

(E) 1/4

An experiment has three possible outcomes, l, J, and K. The probabilities of the outcomes are 0.25, 0.35, and 0.40, respectively. If the experiment is to be performed twice and the successive outcomes are independent, what is the probability that K will not be an outcome either time?

(A) 0.36

(B) 0.40

(C) 0.60

(D) 0.64

(E) 0.80

30. If the inside diameter of a cylindrical garden hose is 1 inch, what is the length, in inches, of a straight hose that can hold a maximum of 1 gallon of water? (1 gallon = 231 cubic inches)

(A) 231

(B)231/π

(C) 924

(D) 924π

(E) 924/π

If each shaded circular region in the figure above has radius 5, then the total area of the shaded regions is what fraction of the area of the square region? the lenght of the side of the square is 30

(A) π/12
(B)π/36
(C) π/60
(D)1/6
(E) 1/3

[sonav]

hi yvram,
Umm, i think these q's belong at the GRE Math forum! I guess you're new and that's why you've posted them here!
I'm sure you'll get responses if you post them at the right forum.
Goodluck!
Sona

[yvram]

Thanks Sonay, ups..... my head is a mess.