Binomial Probabilities

Question

If a seed is planted, it has a 75% chance of growing into a healthy plant.

If 10 seeds are planted, what is the probability that exactly 1 doesn't grow?

Answer 1

25% chance doesn't grow. p=0.25. n = 10 seeds. x = 1 "success" (failure to grow)

10!

----- (0.25)^1 (0.75)^9 = 0.188

1!9!