Question

there are five guns that when properly aimed and fired have respective probabilities of hitting the target as follows , 0.5,0.6,0.7,0.8,0.9 . one of the gun is chosen randomly,aimed and fired. what is the PROBABILITY that the target is hit ?

Answer 1

take the average of the probabilities of all the guns. That is the probability

Answer 2

if it's average then it would be (1/5*0.5+...)/5