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Mathematics 17 Online
OpenStudy (anonymous):

Probability.

OpenStudy (anonymous):

OpenStudy (amistre64):

area inner 1 - -------- = chances area outer

OpenStudy (amistre64):

4pi 1 - ---- = 1 - 1/4 = 3/4 = .75 = 75% ? 16pi

OpenStudy (amistre64):

nah... thats the cahnce of the outer lol

OpenStudy (amistre64):

25% chance you hit the inner

OpenStudy (anonymous):

(Area of a circle) = 2(pi)r^2 \[A' = 2\pi(4^{2}) = 32\pi\]\[A" = 2\pi(2^{2}) = 8\pi \] \[{32\pi \over 8\pi} = {100 \over x} \]\\[x = 25\]

OpenStudy (amistre64):

area of a circle = pi r^2 :)

OpenStudy (anonymous):

but what is the probability that it hits the inner?

OpenStudy (anonymous):

the probabilit is 25%

OpenStudy (amistre64):

25%; 1 in 4

OpenStudy (anonymous):

ops, you're right amistre hehe but still works lol

OpenStudy (amistre64):

lol :) got lucky ;)

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