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General
Easy

Question

From a bag containing 4 white and 5 black balls 3 are drawn at random The odds against these being all black balls is

  1. 5 to 42    
  2. 37 to5    
  3. 5 to37    
  4. 42 to 5    

The correct answer is: 37 to5


    left parenthesis E right parenthesis equals fraction numerator 5 subscript c subscript 3 end subscript end subscript over denominator 9 subscript C subscript 3 end subscript end subscript end fraction
    P left parenthesis E right parenthesis equals fraction numerator 5 over denominator 42 end fraction odds against E are Error converting from MathML to accessible text.

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