Binominal Probability

Discussion in 'Personal Homework Help' started by BlueSilver, Apr 18, 2017.

  1. BlueSilver

    BlueSilver New Member

    If a seed is planted, it has a 90% chance of growing into a healthy plant.

    If 12 seeds are planted, what is the probability that exactly 4 don't grow?

    Im seriously confused is it like u multiple the amount of the (0.90) and multiple (0.30) by power depends how any they r right?

  2. math_celebrity

    math_celebrity Administrator Staff Member

    You want the binomial distribution, where a "success" is that the plant does not grow.

    So if the probability that the plant grows is 0.9, the probability it does not grow is 1 - 0.9 = 0.1.
    We have n = 12, p = 0.1

    You want the probability that exactly 4 of 12 do not grow.

    Use our binomial distribution probability calculator to get P(X = 4) = 0.0213

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