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Math Help - probability.

  1. #1
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    probability.

    a pumpkin if conditions are seasonable the probablity of germination is .85

    if it is dry suppose the probably that a random seed will germinate is .75

    recent weather suggests a 40% chance of dry growing season.

    suppose there is a random pumpkin selected.

    what is the probability that the growing season will be dry and the seed will germinate?

    also, what is the probability that the seed will germinate?

    and, what if the seed did not germinate, what is the probability that the season had a dry start?

    thanks for any help with this one.
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  2. #2
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    Quote Originally Posted by rcmango View Post
    a pumpkin if conditions are seasonable the probablity of germination is .85

    if it is dry suppose the probably that a random seed will germinate is .75

    recent weather suggests a 40% chance of dry growing season.

    suppose there is a random pumpkin selected.

    what is the probability that the growing season will be dry and the seed will germinate?

    also, what is the probability that the seed will germinate?

    and, what if the seed did not germinate, what is the probability that the season had a dry start?

    thanks for any help with this one.
    Start by drawing a tree diagram. Can you do this? (The first two branches will be Dry and Not Dry. The next two branches will be Germinate and Not Germinate).
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  3. #3
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    yes,

    I set up my diagram, and then i used these numbers below.

    (.40)*(.75)
    = .30


    if this is incorrect let me know.

    also, the reasoning, .40 chance of a dry season, and then it will germinate so the chance of that is .75. then multiply those.

    correct?

    thankyou so far.
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  4. #4
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    Quote Originally Posted by rcmango View Post
    yes,

    I set up my diagram, and then i used these numbers below.

    (.40)*(.75)
    = .30


    if this is incorrect let me know.

    also, the reasoning, .40 chance of a dry season, and then it will germinate so the chance of that is .75. then multiply those.

    correct?

    thankyou so far.
    Yes, that's the correct answer for
    what is the probability that the growing season will be dry and the seed will germinate?
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