A Probability Question

[monkeywantsabanana]

Hey guys... Can you guys help with this question - I don't know why I got it wrong.

A square has side length of 4 metres. Inside the square is a circle of radius 1.5 metres. If a dart thrown at the square is equally likely to land at any point inside the square, then the probability that it will land outside the circle is closest to :

A 0.442
B 0.295   
C 0.558
D 0.250
E 0.375

This is what i did:

Area of circle =
                   =

Area of the square = x

Pr(hitting the circle) =   x
                            =

Pr(land outside circle) =
                              =
which is C

The textbook reckon it's 0.442 which is A

What have I done wrong? :O

[brightsky]

Textbook's wrong.

[jane1234]

Agreed. I got 0.558 also.

[monkeywantsabanana]

haha YAY!

thanks guys  !