A company manufactures rubber and plastic washers in the ratio 4:1. The washers are randomly packed into

Question:

A company manufactures rubber and plastic washers in the ratio 4:1. The washers are randomly packed into boxes of 25.

a. Find the probability that a randomly selected box contains:

i. Exactly 21 rubber washers

ii. Exactly 10 plastic washers.

b. A retail pack contains 2000 washers. Find the expectation and variance of the number of rubber washers in a retail pack.

c. Using a suitable approximation, find the probability that a retail pack contains at most 1620 rubber washers.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

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

ISBN: 9781108407304

1st Edition

Authors: Dean Chalmers, Julian Gilbey

See More Books

Question Posted: Sep 14, 2021 02:11 AM

See More Questions

Find the probability that a randomly selected adult has an IQ between 110 and 120 (referred to as bright normal). Assume that adults have IQ scores that are normally distributed with a mean of 100...
Find the probability that a randomly selected adult has an IQ between 90 and 110 (referred to as the normal range).
Find the probability that a randomly selected draft pick is not a linebacker or a quarterback. a. Find the probability that the draft pick is a linebacker or a quarterback. b. Find the complement of...
What is Monetary system? Presentation Introduction, definition, examples, advantages, disadvantage, conclusion
Construct the three independent conversion factors possible for these two reactions: a. 2Na + Cl2 ( 2NaCl b. 4Na + 2Cl2 ( 4NaCl What similarities, if any, exist in the conversion factors from these...
In recent years, Avery Transportation purchased three used buses. Because of frequent turnover in the accounting department, a different accountant selected the depreciation method for each bus, and...
Startups do well in crowded industries under two conditions: (1) they create meaningful value for customers at a fair price and (2) they differentiate themselves from competitors in ways that create...
Indicate the effects of the transactions listed in the following table on total current assets, current ratio, and net income. Use (+) to indicate an increase, (-) to indicate a decrease, and (0) to...
1.Which of the following is an advantage of implementing just-in-time inventory management? Pick 1 option The frequency of raw materials deliveries is reduced Monthly finance costs incurred in...
The exposed surface of a power amplifier for an earth satellite receiver of area 130 mm by 130 mm has a diffuse, gray, opaque coating with an emissivity of 0.5. For typical amplifier operating...
V and W are continuous random variables. V ~N(9, 16) and W ~N(6, 2 ). Find the value of , given that P(W < 8) = 2 P(V < 8).
The ages of the children in a gymnastics club are normally distributed with mean 15.2 years and standard deviation . Find the value of given that 30.5% of the children are less than 13.5 years of...
On 10 May New Mark Ltd sold inventory for $2400 and accepted the customers Business Bank MasterCard. At the end of the day, the Business Bank MasterCard receipts were deposited in New Mark Ltds bank...
When does trademark infringement occur? . What trademarks are protected by law? How does the license protect intellectual property? What works are protected by copyright? What federal legislation...
Analyze a minimum of three (3) objectives of the negotiation process within the aviation industry. Analysis should also outline three (3) strategies to resolve the causes of disputes during the...
What are the key points in Ethics Opinion CAL 2012-184: Virtual Law Office. Please explain the Facts, Issue, Rules of Law, Application and Analysis and the Conclusion.
Example of an issue that affects a destination's resilience or competitiveness. Outline the issue and provide example of what happened and what the destination did to address it.
Synthesis is the combination of ideas to make a sensical whole. In qualitative research, synthesis brings together various study results to draw applicable study conclusions. Discuss the importance...
a. At one of the following ions is purple and the other is blue. Which is which? b. What would be the difference in the colors of the compounds at pH = 3? CH3)2N N(CH3)2
Explain the term "Equivalent Units". Why are they calculated in process costing? [4 Marks] [minimum 350 words]
What is the probability of having 0, 1, and 2+ admissions for an entire week, if the results for different days during the week are assumed to be independent? Hospital Epidemiology Suppose the number...
If there are 12,000 births in the census tract in 1 year, then what is the probability that there will be at least 8 cases of the birth defect during the year (census tract B in Table 4.21)? Table...
If there are 5000 births in the census tract in 1 year, then what is the probability that there will be exactly 5 cases of the birth defect during the year (census tract A in Table 4.21)? Table 4.21:...
Describe the basic components of Neurotechnology. How does it work?
Problem 3 (10 pts.) Consider steady state heat transfer in a cylinder as shown. The ends of the cylinder are held at two different temperatures and the other surface is held at temperature equal to...
Discuss the importance of menu engineering and menu design as it applies to the successful operation of a casual or fin?

A company manufactures rubber and plastic washers in the ratio 4:1. The washers are randomly packed into

Question:

Step by Step Answer:

a i 21 rubber washers The probability of selecting 21 rubber washers ...View the full answer

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

Students also viewed these Mathematics questions