How Likely Is That?
Shelly Berman firstname.lastname@example.org
If you toss a single number cube (one die), what is the probability of rolling an even number?
One way of thinking about probability is to make a fraction that shows:
(the number of possibilities).
When you roll a number cube you can get any of the six numbers: 1, 2, 3, 4, 5, or 6.
Three of these numbers are even: 2, 4, and 6.
That is, the probability of rolling an even number can be written as: P(even number) = (3 numbers we want)/(6 possible numbers) = (3/6).
So, the probability of rolling an even number on a number cube is (3/6).
How do you think we could measure the probability of tossing a die and getting a 1?
Here's a set of twenty cards. Each card has a number from 1 to 10, and the number is either red or black.
If I draw one card without looking, what is the probability that the card I draw will:
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