Binominal Probability

[BlueSilver]

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?

 

[math_celebrity]

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