If a seed is planted, it has a 65% chance of growing into a healthy plant.

Question

If 11 seeds are planted, what is the probability that exactly 1 doesn't grow?

Answer 1

prob(grow) = .65
prob(not grow) = .35

prob(1 of 11 will not grow)
= C(11,1)(.35)(.65)^10
= .05183

Answer 2

If a seed is planted, it has a 65% chance of growing into a healthy plant.

If 12 seeds are planted, what is the probability that exactly 2 don't grow?

Answer 3

If a seed is planted, it has a 65% chance of growing into a healthy plant.

If 7 seeds are planted, what is the probability that exactly 1 doesn't grow?