A dart board has 4 concentric circles with radii 1, 2, 3 and 4 units respectively. If a dart is thrown and it lands on the board, find the probability that it landed on outermost circle area.
1
7/16
2
5/16
3
1/2
4
9/16
5
1/4
A dart board has 4 concentric circles with radii 1, 2, 3 and 4 units respectively. If a dart is thrown and it lands on the board, find the probability that it landed on outermost circle area.