Question

Let the probability mass function of a random variable 𝑋 be given by
𝑃(𝑋=𝑛) = $\frac{𝑘}{(𝑛-1)𝑛}$ , 𝑛=2, 3, … ,
where 𝑘 is a positive constant. Then, 𝑃(𝑋≥17 |𝑋≥5) equals ________

Answer 1

The correct answer is: 0.25