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[obm-l] Probabilidade - Ducks and hunters




Não tenho nem idéia de como começar, só entendi que o número de ducks 
num flock é Poisson(6). Alguém arrisca?


"Ten hunters are waiting for ducks to fly by. When a flock of ducks 
flies overhead, the hunters fire at the same time, but each chooses his 
target at random, independently of the others. If each hunter 
independently hits his target with probability 0.6, compute the expected 
number of ducks that are hit. Assume that the number of ducks in a flock 
is a Poisson random variable with mean 6." (A First Course in Probability)


Agradeço desde já.
[]s, Claudio Freitas
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