Probability: Defective calculators

A sample of 4 different calculators is randomly selected from a group containing 42 that are defective and 27 that have no defects. what is the probability that all four of the calculators selected are defective?

Solution Summary

The solution provides step by step method for the calculation of probability that all four of the calculators selected are defective. Formula for the calculation and Interpretations of the results are also included.