If seven flowerbeds are each planted with 20 seedlings find the probability that at least 12 seedlings mature in exactly five of the flowerbeds.
Providing each seedling has a 0.7 chance of developing into a mature plant.
Hello, BabyMilo!
In any one particular flowerbed:A seedling has a 0.7 probability of developing into a mature plant.
Seven flowerbeds are each planted with 20 seedlings.
Find the probability that at least 12 seedlings mature in exactly five of the flowerbeds.
. .
The probability that at least 12 mature is the sum of the above probabilities.
. . Call this sum
We have a choice of 5 of the 7 flowerbeds: .
. . Therefore: .