# Three shooters

Three shooters shoot, each one time, on the same target. The first hit the target with a probability of 0.7; second with a probability of 0.8 and a third with a probability of 0.9. What is the probability to hit the target:

a) just once

b) at least once

c) at least twice

a) just once

b) at least once

c) at least twice

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