lulal ume remaining: 3:05 Question #9 / 25 At a factory that produces pistons fo

Question

lulal ume remaining: 3:05 Question #9 / 25 At a factory that produces pistons for cars, Machine i produced 414 satisfactory pistons and 276 unsatisfactory pistons today. Machine 2 produced 540 satisfactory pistons and 60 unsatisfactory pistons today. Suppose that one piston from Machine 1 and one piston from Machine 2 are chosen at random from today's batch. What is the probability that the piston chosen from Machine 1 is unsatisfactory and the piston chosen frorn Machine 2 is satisfactory ? Do not round your answer (If necessary, consult a list of formulas.) Help Next Question >>

Explanation / Answer

Ans:

Probability of choosing a unsatisfactory pistom from Machine 1=276/(414+276)=0.4

Probability of choosing a satisfactory pistom from Machine 2=540/(540+60)=0.9

P(unsatisfactory from Machine 1 and satisfactory from Machine 2)=0.4*0.9=0.36

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