Help 31,32
31.
Area of the board = pi * 16^2 = 256 pi
Area of the bulls-eye = pi * 6^2 = 36 pi
So....the probability is 36 / 256 = 9/64 ≈ 14.1%
32.
P ( prime or > 4) = P(prime) + P (> 4) - P (prime and > 4) =
3/6 + 2/6 - 1/6 =
4/6 =
2/3
numbers greater than 4, or prime numbers.
2,3,5,6
4/6
=2/3