Question: 2017 Winter Final - 12
Let $X = \{1,2,3,\dots,10\}$. We choose, uniformly at random, a subset $Y$ of $X$, where $Y$ has
size 5. Define the events
- A = "1 is an element of $Y$",
- B = "7 is an element of $Y$".
(a)
4/9
(b)
4/8
(c)
5/9
(d)
5/8