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a car salesperson as arrange a visit on three perspective customers in a week based on the past experiences helpers and laws that there is 10% chance of closing a sale on each visit determine the probability distribution of the number of sales and persons will make


Suppose three test kits are tested at random. Let N be the random variable for the number of non - defective test kits, construct the probability distribution P(N). What can you conclude about the effectivity of the COVID-19 Rapid Antibody Test kits based on your probability distribution? Explain briefly.



find the remaining parts of the quadrantal spherical triangles (c=90°) given the following, giveb parts b= 45°20 a=76°40

A 100 kg block is pulled at a constant speed of 5 m/s across a horizontal force by an applied force of 122 N directed 37 o above the horizontal. The rate at which the force does work on the block is.


Find the average horsepower, P =? required to raise a 150 kg drum to a height of 20 m in a time of 1 minute. SOLUTION: P = wk/t = mgH/t

You push against the rock with a force of F = 100N for t = 20 seconds. If the rock does not move d = 0, how much work have you done, Wk?


SOLUTION: Wk = F d cos 0


The number X of days in the summer months that a construction crew are cannot work because of the weather has the probability distribution



X P(x)


6 0.03


7 0.08


8 0.15


9 0.20


10 0.19


11 0.16


12. 0.10


13 0.07


14 0.02



A. Find the probability that no more than ten days will be lost next summer.



B. Find the probability that from 88 to 1212 will lost next summer.



C. Find the probability that no days at all will be lost next summer.



D. Compute the mean and standard deviation of X. Interpret the mean in the context of the problem.



Solve the following problem:


A government office has six telephone lines. For the past months, the probability distribution of the random variable Y which represents the number busy line per day in shown in the records below



Y P(Y)


0 0.052


1 0.054


2 0.232


3 0.240


4 0.174


5 0.105


6 0.043



1. What is the probability that exactly four telephone


lines are busy in a day?


2.What is the probability that, at least ,four telephone lines busy in a day?


3.What is the probability that at least two but at most


four telephone lines busy in a day?


4.What is the probability that at least one telephone


lines are busy in a day?


5. What is the expected number of busy telephone lines in a day? Explain the results


6. What is the standard deviation of the number of busy telephone lines in a day? Explain the results.

Make a creative story about the lesson of the polarity of molecules


A cookie recipe for 60 cookies calls for 4 cups of flour. How much flour is needed to make 90 cookies?


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