Question 139761
Find the probability that a dart will 
(a)hit in the baseball field = 1600/3600 = 4/9
(b) hit in one of the 4 smaller squares = 400/3600 = 1/9
(c) will miss all five target squares: 4/9 
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on a square dart board that has 60cm sides: area = 3600 sq cm.
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square field (inside the  dart board)40cm on it's sides: 40^2 = 1600 sq cm.
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and 4 smaller squares (inside square dart board, but outside of baseball field) each 10cm on a side as the targets. 4*10^2 = 400 sq cm.
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Cheers,
Stan H.