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1984 AMC 12 Question 19

AMC12 · 1984 AMC 12

Question 19

A box contains $11$ balls, numbered $1,$ $2,$ $3,$ $\ldots,$ $11.$ If $6$ balls are drawn simultaneously at random, what is the probability that the sum of the numbers on the balls drawn is odd?
  1. $\frac{100}{231}$
  2. $\frac{115}{231}$
  3. $\frac12$
  4. $\frac{118}{231}$
  5. $\frac6{11}$