# SOLUTION: The number of defects in a sample of 20 parts is recorded for quality control purposes; over the last year the number of defects and their occurrence rate has been: 0 defects, 82%

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 Question 464972: The number of defects in a sample of 20 parts is recorded for quality control purposes; over the last year the number of defects and their occurrence rate has been: 0 defects, 82%; 1 defect, 13%, 2 defects, 4%, 3 defects, 1%. Find the expected number of defects in the next sample of 20 parts. Found 2 solutions by edjones, stanbon:Answer by edjones(7569)   (Show Source): You can put this solution on YOUR website!1*.13+2*.04+3*.01=.24 20*.24=4.8 the expected number of defects in the next sample of 20 parts. . Ed Answer by stanbon(57282)   (Show Source): You can put this solution on YOUR website!The number of defects in a sample of 20 parts is recorded for quality control purposes; over the last year the number of defects and their occurrence rate has been: 0 defects, 82%; 1 defect, 13%, 2 defects, 4%, 3 defects, 1%. Find the expected number of defects in the next sample of 20 parts. ------------------------------------------ E(x) = 0*0.82 + 1*0.13 + 2*0.04 + 3*0.01 ------------------------------------------ E(x) = 0 + 0.13 + 0.08 + 0.03 = 0.24 is the expected # of defects in a sample of 20 parts. ============================ Cheers, Stan H.