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Mathematics 8 Online
OpenStudy (mackenzie2013):

Mark flips a coin and rolls a standard number cube. Find the probability that the coin will show tails and the cube will show a two or three.

OpenStudy (phi):

find the probability of each "event" and multiply them

OpenStudy (phi):

I assume you know a die has 6 sides, and 2 out of the 6 sides are "winners" (for this problem)

OpenStudy (mackenzie2013):

so it'd be 6/2?

OpenStudy (phi):

probability is between 0 (never) and 1 (always) First step, what is the chance of getting tails ( a coin has 2 sides, and 1 side is tails)

OpenStudy (mackenzie2013):

likely?

OpenStudy (phi):

we want a number (fraction) the top part of the fraction are the number of ways to succeed, the bottom number is the number of possible outcomes. With a coin, which has 2 sides heads and tails, there is one side that counts as success -- the tails side so 1 goes in the top what goes in the bottom ?

OpenStudy (mackenzie2013):

2?

OpenStudy (phi):

yes. there are 2 possible outcomes (heads or tails) so the chance of getting a tail is 1/2

OpenStudy (mackenzie2013):

Agh thank you!

OpenStudy (phi):

now find the chance of rolling a 2 or 3. How many numbers count as success? If we get a 2 or 3 we "win". that is 2 ways to win. that means 2 goes in the top now put in the total number of outcomes you can roll . any idea?

OpenStudy (mackenzie2013):

it would be the number of all so a 6 or 8 *Blonde moment*

OpenStudy (phi):

Normal dice have 6 sides (not 8)

OpenStudy (mackenzie2013):

so the bottom number would be 6

OpenStudy (phi):

yes, and what is the chance of rolling a 2 or 3 ? (you have the top and bottom, so you can write the fraction)

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