## anonymous 5 years ago Probability.

1. anonymous

2. amistre64

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

3. amistre64

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

4. amistre64

nah... thats the cahnce of the outer lol

5. amistre64

25% chance you hit the inner

6. 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$

7. amistre64

area of a circle = pi r^2 :)

8. anonymous

but what is the probability that it hits the inner?

9. anonymous

the probabilit is 25%

10. amistre64

25%; 1 in 4

11. anonymous

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

12. amistre64

lol :) got lucky ;)