(Answered) A lot of 20 typewriters contains four defectives 5

Statistics

A lot of 20 typewriters contains four defectives. 5 typewriters are randomly selected, what is the probability that at least two of the typewriters are defective? Round your answer to four decimal places.

Before a TV set leaves the factory it is given a quality control check. The probability that the TV contains zero, one or two defects is .88, .08 and .04 respectively. In a sample of 16 TVs, find the probability that 9 will have no defects, 4 will have one defect and 3 will have two defects. Round your answer to 3 decimal places (beyond the zeros)

A jar contains 5 red, 6 white and 7 blue marbles. 5 marbles are randomly selected from the jar. Find the probability of drawing 2 red and 3 white marbles. Round your answers to 4 decimal places.

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