A fair coin is tossed six times. Let us assume that success is a heads. Let (n=6)

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A fair coin is tossed six times. Let us assume that success is a heads. Let \(n=6\) and \(p=q=\frac{1}{2}\).

(a) What is the probability that exactly two heads occur (i.e., \(k=2\) )?

(b) What is the probability of getting at least four heads (i.e., \(k=\) \(4,5\), and 6\()\) ?

(c) What is the probability that at least one head occurs?

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