Maths-
General
Easy

Question

When a coin is tossed, p(X = r heads)=

  1. fraction numerator blank to the power of n end exponent c subscript r end subscript over denominator 2 to the power of n end exponent end fraction    
  2. fraction numerator blank to the power of n end exponent c subscript r end subscript over denominator 2 to the power of n minus 1 end exponent end fraction    
  3. fraction numerator blank to the power of n end exponent c subscript n end subscript over denominator 2 to the power of n minus 1 end exponent end fraction    
  4. fraction numerator blank to the power of n end exponent c subscript n end subscript over denominator 2 to the power of n end exponent end fraction    

The correct answer is: fraction numerator blank to the power of n end exponent c subscript r end subscript over denominator 2 to the power of n end exponent end fraction


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