Question

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

If 7 seeds are planted, what is the probability that exactly 3 don't grow?

Answer 1

241*107

Answer 2

rubbish

There's a 25% chance of not growing. So,

P(3 not) = 7C3 .25^3 .75^4 = 0.17

Answer 3

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

If 9 seeds are planted, what is the probability that exactly 2 don't grow?