Tip:
Highlight text to annotate it
X
Here’s a boring, unshmoopy question you’ll find on the exam…
What is the probability of rolling a four and then rolling an even number on a fair-numbered
die? And here are the potential answers:
It’s a vanilla two-step dance in Probabilityland. There are 6 sides to a die. As long as you’re
not engaged in a role-playing game in your parents’ basement.
Rolling any one number carries a 1 in 6 chance. Then we roll a second time and, since there
are 3 even numbers out of six…
…our odds are 3 out of 6 or 1 out of 2…
… or 50-50 in gambler lingo. To get the total odds of both things happening,
we just multiply them – and we get: 1/6 times 1/2 which is one-twelfth… and
the answer is B. In gambler lingo, we’re guessing that would
be 50… 600? Doesn’t have quite the same ring to it…