154- A fair coin is tossed repeatedly. What is the probability that the number 4 appears before the number 6? (1) $\dfrac{1}{3}$ (2) $\dfrac{1}{2}$ (3) $\dfrac{2}{3}$ (4) $\dfrac{3}{4}$
\textbf{154-} A fair coin is tossed repeatedly. What is the probability that the number 4 appears before the number 6?
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(1) $\dfrac{1}{3}$ \hfill (2) $\dfrac{1}{2}$ \hfill (3) $\dfrac{2}{3}$ \hfill (4) $\dfrac{3}{4}$
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