0.1% of a certain type of RAM chips are defective. A student needs 20 chips for a certain board.How many should he/she buy in order for there to be a 99.9% chance or greater of having at least20 working (not defective) chips?

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Answered: 0.1% of a certain type of RAM chips are…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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A slot machine has 3 dials. Each dial has 30 positions, one of which is "jackpot" position. Assuming each play spins the dials and stops each independently and randomly, what are the odds of one play winning the jackpot? 1. 1/3=0.03 or 3% 2. 3/(30+30+30)=3/90=0.33 or 33% 3. 3/(30x30x30)=3/27000=0.0001 or 0.01% 4. 1/(30x30x30)=1/27000= 0.00003 or 0.003%
A group of 50,000 tax forms has an average gross income of $37,000, with an SD of about $20,000. Furthermore, 20% of the forms have a gross income over $50,000. A group of 900 forms is chosen at random for audit. What is the chance that between 19% and 21% of the forms chosen for audit have gross income over $50,000? (Show the box model and the result of your work.) Answer: %
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Suppose 33.3% of high school students eat pizza and 42% drink soda. If 17.3% of high school students eat pizza and drink soda, what is the probability that a randomly chosen high student will either eat pizza, drink soda, or both?
A group of children are getting sorted into two different groups. They put six blue marbles and six green marbles into a bag. The first two children both randomly draw a blue marble. 1.If they don’t place the marble back, what are the odds that the next child selects a blue marble? The answer is in percentage(%).
A particular gambling game pays 4 to 1 and has a 20% chance to win. Someone will bet $10, 125 times, and keep track of the total amount won or lost. Which of the following boxes will produce the right answers? Check ALL answers that apply. a. 1 ticket labeled $10 and 4 tickets labeled -$10 b. 20 tickets labeled $10 and 80 tickets labeled -$10 c. 20 tickets labeled 1 and 80 tickets labeled 0 d. 1 ticket labeled $40 and 4 tickets labeled -$10 e. 20 tickets labeled $40 and 80 tickets labeled -$10 f. 1 ticket labeled 1 and 4 tickets labeled 0
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You have 10 people with a cold and you have a remedy with a 20% chance of success. What is the chance that your remedy will cure at least one sufferer? O 0.107 O 0.268 0.624 O 0.893
A slot machine has 3 dials. Each dial has 30 positions, one of which is "Jackpot". To win the jackpot, all three dials must be in the "Jackpot" position. Assuming each play spins the dials and stops each independently and randomly, what are the odds of one play winning the jackpot? 1/30 = 0.03 or 3% 3/(30+30+30) = 3/90 = 0.33 or 33% 3/(30×30×30) = 3/27000 = 0.0001 or 0.01% 1/(30×30×30) = 1/27000 = 0.00003 or 0.003% Question 18

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0.1% of a certain type of RAM chips are defective. A student needs 20 chips for a certain board. How many should he/she buy in order for there to be a 99.9% chance or greater of having at least 20 working (not defective) chips?