It is known that 2% of the cheapest memory sticks on the market are defective. a. In

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It is known that 2% of the cheapest memory sticks on the market are defective.

a. In a random sample of 400 of these memory sticks, find approximately the probability that at least five but at most 11 are defective.

b. Ten samples of 400 memory sticks are tested. Find an approximate value for the probability that there are fewer than 12 defective memory sticks in more than seven of the samples.

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Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

ISBN: 9781108407304

1st Edition

Authors: Dean Chalmers, Julian Gilbey

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Question Posted: Sep 14, 2021 02:11 AM

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It is known that 2% of the cheapest memory sticks on the market are defective. a. In

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In the usual notation we are given N10 n400 PProbability of ...View the full answer

Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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