Solution: The probability follows a binomial distribution with parameters $n = 4$ (trials) and $p = \frac{1}{3}$ (success probability). The formula for exactly $k$ successes is $\binom{n}{k} p^k (1-p)^{n-k}$. For $k = 2$:

Wed, 06 May 2026 12:31:49 +0000

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