SOLUTION: need help in detail with this problem i need to know this step by step like elementary...step by step so i can understand it here we go.... Essay; show all work. A simple dartboard

Algebra ->  Probability-and-statistics -> SOLUTION: need help in detail with this problem i need to know this step by step like elementary...step by step so i can understand it here we go.... Essay; show all work. A simple dartboard      Log On


   



Question 464849: need help in detail with this problem i need to know this step by step like elementary...step by step so i can understand it here we go.... Essay; show all work. A simple dartboard has three areas... the main board has a radius of 11 inches, there is a circle with a radius of 5 inches, and the bullseye has a radiuls of 3 inches. What is the probability of a random dart landing inside the bulleye? Round tot he nearest thousandth..(hint: use A=pir^2)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A simple dartboard has three areas... the main board has a radius of 11 inches, there is a circle with a radius of 5 inches, and the bullseye has a radius of 3 inches. What is the probability of a random dart landing inside the bullseye? Round to the nearest thousandth..(hint: use A=pir^2)
-------------------
Main board area: pi*11^2 = 121pi sq in
----
Circle area: pi*5^2 = 25pi sq in
----
Bullseye area = pi*3^2 = 9pi sq in
--------------------
P(dart in bullseye) = 9pi/121p = 9/121
===========================================
Cheers,
Stan H.