Challenge 4: Binomial Distribution1. How many ways can a team of 7 be chosen from a panel of 20?2. The probability that a silicon chip works is 0.97. Five such chips are tested. Calculatethe probability that (a) all 5 chips work (b) one chip does not work.3. The internet worm "KLEZ" is the clear leader in the number of top malicioussoftware instances. A recent survey reported KLEZ accounted for 53% of reportedmalicious instances. Suppose 7 malicious software instances are reported andassuming independence, calculate the probability (correct to 4 decimal places) that:(a) Exactly 3 were the internet worm KLEZ?(b) At least 1 was the worm KLEZ?Find the mean and standard deviation of the number of KLEZ instances among arandom sample of 160 reported malicious instances. Answer correct to two decimalplaces.

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Challenge 4: Binomial Distribution 1. How many ways can a team of 7 be chosen from a panel of 20?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter6: Ratio, Proportion, And Probability

Section6.7: Probability And Odds

Problem 2C

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Question

Challenge 4: Binomial Distribution
1. How many ways can a team of 7 be chosen from a panel of 20?
2. The probability that a silicon chip works is 0.97. Five such chips are tested. Calculate
the probability that (a) all 5 chips work (b) one chip does not work.
3. The internet worm "KLEZ" is the clear leader in the number of top malicious
software instances. A recent survey reported KLEZ accounted for 53% of reported
malicious instances. Suppose 7 malicious software instances are reported and
assuming independence, calculate the probability (correct to 4 decimal places) that:
(a) Exactly 3 were the internet worm KLEZ?
(b) At least 1 was the worm KLEZ?
Find the mean and standard deviation of the number of KLEZ instances among a
random sample of 160 reported malicious instances. Answer correct to two decimal
places.

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