Question

three machines with capacities proportional to 2:3:4 are producing bullets. the probability that the machines produce defective are 0.1, 0.2 and 0.1 respectively.If a bullet is drawn randomly from one day's production and is found to be defective. what is the probability that it came from
(i) machine X
(ii) machines Y or Z
Please reply as soon as possible

Answer 1

Answer:

let 2x 3x 4x add it =9x=0.1+0.2