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?

3 answers

241*107
rubbish

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

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