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1984 AMC 12/AHSME
19
19
Part of
1984 AMC 12/AHSME
Problems
(1)
6 randomly chosen numbers and odd sum
Source:
10/24/2005
A box contains 11 balls, numbered 1,2,3,....,11. If 6 balls are drawn simultaneously at random, what is the probability that the sum of the numbers on the balls drawn is odd? A.
100
231
\frac{100}{231}
231
100
B.
115
231
\frac{115}{231}
231
115
C.
1
2
\frac{1}{2}
2
1
D.
118
231
\frac{118}{231}
231
118
E.
6
11
\frac{6}{11}
11
6
probability