Question: there are two machines at a factory that are used...
There are two machines at a factory that are used for printing high quality posters of the periodic table. Machine 1 prints 70% of the posters produced by the factory and machine 2 the remaining 30%. On occasion, each machine omits the last column of elements; the probability of this happening is 0.06 for machine 1 and 0.13 for machine 2.
i. What is the probability that a poster printed at the factory will have the last column of elements omitted?
ii. Given that a poster printed at the factory has the last column of elements omitted, what is the probability that is was printed by machine 1?