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Mackenzie2013

  • one year ago

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.

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  1. phi
    • one year ago
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    find the probability of each "event" and multiply them

  2. phi
    • one year ago
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    I assume you know a die has 6 sides, and 2 out of the 6 sides are "winners" (for this problem)

  3. Mackenzie2013
    • one year ago
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    so it'd be 6/2?

  4. phi
    • one year ago
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    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)

  5. Mackenzie2013
    • one year ago
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    likely?

  6. phi
    • one year ago
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    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 ?

  7. Mackenzie2013
    • one year ago
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    2?

  8. phi
    • one year ago
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    yes. there are 2 possible outcomes (heads or tails) so the chance of getting a tail is 1/2

  9. Mackenzie2013
    • one year ago
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    Agh thank you!

  10. phi
    • one year ago
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    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?

  11. Mackenzie2013
    • one year ago
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    it would be the number of all so a 6 or 8 *Blonde moment*

  12. phi
    • one year ago
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    Normal dice have 6 sides (not 8)

  13. Mackenzie2013
    • one year ago
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    so the bottom number would be 6

  14. phi
    • one year ago
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    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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