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A sample of 2 different calculators (without replacement) is randomly selected from a group containing 6...

A sample of 2 different calculators (without replacement) is randomly selected from a group containing 6 that are defective and 24 without defects. (30 calculators total)

Draw A Tree diagram with probabilities assigned.

a. What is the probability that both calculators are good. (Use a tree diagram to find the indicated probability).

b.Find the probability that the second calculator was good given the condition that the first obe was defective

Math   Statistics-And-Probability   
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