You instructor is considering the installation of a circular dart board with radius on the office wall. instead of actually reading your papers, it has been suggested that grades be assigned by chance by dividing the board into three grade sectors and tossing a dart.

The area of an "A" sector with central angle is .

The area of a "B" sector with central angle is .

The area of a "C" sector with central angle is .

Assume a dart is randomly thrown at the board and the grade is noted on your paper. List your grade in order of increasing likelihood:
.

If the chance of your receiving a given grade is based upon the size of the sector divided by the size of the whole circle, determine the likelihood that you will receive an "A".

Hint:

You can earn partial credit on this problem.