How many ways to invite five friends
A person has 8 friends but can only invite 5 to their birthday party. How many ways can she invite 5 friends if two of the friends will only attend together? show full working.
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Determine the smallest integer number of trunk lines needed so that tq the waiting time in the queue satisfies the relation t P[tq < 60 sec.]> 0.95, i.e., the probability exceeds 95% that the time the message spends in the buffer is less th
If the probability that a fluorescent light has a useful life of at least 800 hours is 0.9, find the probabilities that among 20 such lights
A second approach is to compute a binary variable having the value 1 if X<Y and 0 otherwise. The average value of the binary variable will be an estimate of the reliability.
Imperfections in computer circuit boards and computer chips lend themselves to statistical treatment. For a particular type of board the probability of a diode failure is 0.03. Suppose a circuit board contains 200 diodes. What is the mean number o
In the case of a certain type of copper wire, it is known that, on the average, 1.5 flaws occur per millimeter. Assuming that the number of flaws is a Poisson random variable, what is the probability that no flaws occur in a certain portion of wir
Savallas Company is highly automated and uses computers to control manufacturing operations. The company uses a job-order costing system and applies manufacturing overhead cost to products.
The interest expense on the income statement relates to the bonds payable; the amount of bonds outstanding did not change throughout the year.
Two out of five adult smokers aquired the habit by age 14. If 400 smokers are randomly selescted, find the probability that 170 or fewer aquired the habit by age 14.
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