Question

An aircraft gun can take a maximum of 4 shots at an enemy plane moving away from it, the probabilities of hitting the plane at first, second, third and fourth shots are 0.4,0.3,0.2,and 0.1 respectively. what is the probability that the gun hits the plane

Answer 1

We know that the sum of all the probabilities is 1 then .4 +.3 +.2 +.1=1
Then prob ability of not hitting the plane is 0