4. Suppose we have a random variable ( X ) where the probability associated with the value ( k ) is ( left(egin{array}{c}15 \ kend{array} ight)(0.29)^{k}(0.71)^{15-k} ) for ( k=0, ldots, 15 ). What is the mean of ( X ) ? A. ( 0.29 ) B. ( 0.71 ) C. ( 4.35 ) D. ( 10.65 ) E. None of the above
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