A supermarket claims that its checkout scanners correctly price 99.8% of the items sold. How many items would you expect to buy, on average, to find one that scans incorrectly?

Question

Alayna Scott

Mathematics

1 January, 21:10

A supermarket claims that its checkout scanners correctly price 99.8% of the items sold. How many items would you expect to buy, on average, to find one that scans incorrectly?

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Answers (1)

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Cadence Pugh · Answer 1

The answer is 50.

Step-by-step explanation:

A supermarket claims that its checkout scanners correctly price 99.8% of the items sold. That means for every 100 product the scanner prices wrong 2 products. Therefore, to find one that scans incorrectly, minimum 50 item i am expect to buy.