\textbf{127--} In a bag there are 16 balls numbered 1 to 16. Two balls are drawn randomly and without replacement. If we know that the number of the second ball is less than the number of the first ball, what is the probability that the number of the first ball is 16?
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(1) $\dfrac{1}{16}$ \hfill (2) $\dfrac{1}{12}$ \hfill (3) $\dfrac{1}{8}$ \hfill (4) $\dfrac{1}{4}$
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