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Mathematics, 22.10.2020 15:01 21marmong

A factory makes memory cards in batches of 4000. For testing purposes, 150 memory cards are selected at random from each batch. Of this sample, 9 memory cards are found to be broken. About how many memory cards in the batch are likely to be broken in all?

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A factory makes memory cards in batches of 4000. For testing purposes, 150 memory cards are selected...

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