question_answer

In a toys making factory, machines A, B and C manufacture respectively 25%, 35% and 40% of the total toys of their output 5%, 4% and 2% respectively are defective toys. A toy is drawn at random from the product. If the toy drawn is found to be defective, what is the probability that it is manufactured by the machine B?

A)  \[\frac{17}{69}\]                      

B)  \[\frac{28}{69}\]          

C)  \[\frac{35}{69}\]                      

D)  None of these