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 thatat least12 mature is theof the above probabilities.sum

. . Call this sum

We have a choice of 5 of the 7 flowerbeds: .

. . Therefore: .