Question: A quality-control engineer randomly selects five radios from an assembly line. Experience has shown that the probabilities of finding 0, 1, 2, 3, 4, or

A quality-control engineer randomly selects five radios from an assembly line. Experience has shown that the probabilities of finding 0, 1, 2, 3, 4, or 5 defective radios are as shown in the table.

a. What is the probability the engineer will find at least one defective radio in a random sample of five?
b. Make a copy of this table on your paper, and complete the entries for the column titled x · P(x).
c. Find the sum of the entries in the column titled x · P(x).
d. What is the real-world meaning of your answer in 11c?

Number of defective radios Probability Plx) 420 312 173 064 031

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