Do not round your answerSolutionSo the chances of picking a

Do not round your answer.

Solution

So the chances of picking a unsatisfactory piston from Machine 1 is 57/(243+57) = 57/300 = 0.19
So the chances are 0.19

The chances of picking a satisfactory piston from Machine 2 is 232/(232+58) = 232/290 = 0.8
So the chances are 0.8

Then times these together to get the full probability of picking these two pistons:
0.19 x 0.8 = 0.152