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Binomial with mean 8 and variance 4: P(X <= 2) = k / 2^16, find k

The same question, asked 2 times: 3 May 2023 S2, 11 May 2024 S2. Every wording below, oldest first.

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  1. Question 1

    3 May 2023 S2

    109
    Let a random variable XX have a Binomial distribution with mean 8 and variance 4. If P(x≤2)=k216P(x\leq2)=\frac{k}{2^{16}}, then kk is equal to

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  2. Question 2

    11 May 2024 S2

    111
    Let a random variable X have a Binomial distribution with mean 8 and variance 4. If P(X≤2)=K216P(X\leq 2) = \frac{K}{2^{16}}, then K is

    Tap an option to check your answer.