Confusing?

a seed company advertises that,if its geranium seeds is properly planted the probability that the seed will grow is 90%.


a) what is the probability that a geranium seed that thst hss been planted properly will fail to grow


b)if 5 geranium seeds are properly planted what is the probability that all wll fail to grow

Confusing?
(a)


Percentage probabilities for failure and for success must add up to 100.


90% probability of success means 10% probability of failure.





(b)


There is 10% chance that one will fail to grow.


10% means 10/100 or 1/10.


The chance that five will fail is:


(1/10)^5 = 1 in 100,000.
Reply:A. 10%


B. 2%