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## Homework Statement

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.

## Homework Equations

(work shown below)

## The Attempt at a Solution

1*.13+2*.04+3*.01=.24

20*.24=4.8 the expected number of defects in the next sample of 20 parts.