X ~ B(n, p): the ratio P(X = k) / P(X = k - 1)

1. A.
   $\frac{n - k}{k - 1} \cdot \frac{p}{q}$
2. B.
   $\frac{n - k + 1}{k + 1} \cdot \frac{p}{q}$
3. C.
   $\frac{n + 1}{k} \cdot \frac{q}{p}$
4. D.
   $\frac{n - k + 1}{k} \cdot \frac{p}{q}$

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1. A.
   $\left(\dfrac{n - k}{k}\right)\dfrac{p}{q}$
2. B.
   $\left(\dfrac{n - k + 1}{k}\right)\dfrac{p}{q}$
3. C.
   $\left(\dfrac{n - k}{k - 1}\right)\dfrac{p}{q}$
4. D.
   $\left(\dfrac{n - k + 1}{k - 1}\right)\dfrac{p}{q}$

Tap an option to check your answer.